total_victims

age_of_shooter

prior_signs_mental_health_issues

weapons_obtained_legally

where_obtained

weapon_details

sources_additional_age

https://apnews.com/article/arkansas-grocery-shooting-a4c8496ca2fc60feb1f52e5298cbecc2; https://www.cbsnews.com/video/death-toll-rises-arkansas-shooting-suspect-in-custody/

Anthony Polito, 67, a former university professor, died in a shootout with police after opening fire on the UNLV campus.

semiautomatic handgun

https://www.nbcnews.com/news/us-news/anthony-polito-s-know-unlv-shooting-suspect-accused-killing-3-wounding-rcna128499; https://www.reviewjournal.com/crime/shootings/police-engaged-suspect-in-shootout-unlv-police-chief-says-2960370/; https://www.cnn.com/2023/12/06/us/university-of-nevada-las-vegas-campus-shooting/index.html; https://news.yahoo.com/authorities-responding-reports-multiple-victims-201320923.html

Robert Card, 40, an Army reservist and firearms instructor, opened fire in the two locations, then fled and became the focus of an intensive manhunt. He was found two days later, dead from a self-inflicted gunshot. For several months prior to the attack, Card's family members, military colleagues and others sounded alarms about his erractic and troubling behaviors, and he had undergone a psychiatric evaluation, but no attempts were made under Maine law to remove firearms from Card.

Card reportedly spoke of "hearing voices" and had made threats about attacking a National Guard facility, among other behavioral warning signs prior to the attack. He subsequently had undergone a mental health evaluation and was released from the hospital after a two-week stay.

AR-15-style rifle (Rugar SFAR)

https://www.washingtonpost.com/nation/2023/10/25/lewiston-maine-shooting-live-updates/; https://www.yahoo.com/gma/alleged-maine-gunman-tried-buy-110039296.html

https://www.nytimes.com/article/lewiston-maine-shootings.html; https://www.cnn.com/maine-shooting-robert-card-investigation/index.html

Jacksonville Dollar General store shooting

Ryan Palmeter, 21, outfitted in body armor, fatally shot three Black victims in what authorities said was a racist hate crime. He then shot himself to death on the scene as police responded. Palmeter had first gone to Edward Waters University, a historically Black college, but was refused entry.

Palmeter was evaluated under Florida's Baker Act in 2017 (details unknown) and was the subject of a domestic disturbance call in 2016.

semiautomatic rifle, semiautomatic handgun

AR-15-style rifle; Glock pistol

Trabuco Canyon, California

John Snowling, 59, a retired sergeant from the Ventura Police Department, was targeting his estranged wife, and was killed by police responding to the scene.

semiautomatic handguns; shotgun

https://www.ocregister.com/2023/08/24/cooks-corner-mass-shooter-a-crazy-ex-cop-reportedly-was-targeting-wife/; https://www.latimes.com/california/story/2023-08-23/mass-shooting-cooks-corner-biker-bar-trebuco-orange-county

Philadelphia, Pennsylvania

Kimbrady Carriker, 40, wearing a ski mask and body armor, allegedly opened fire randomly in the street in a southwestern neighborhood of Philadelphia. Carriker, who lived nearby, was cornered by police and apprehended. Early statements from local authorities were conflicting about Carriker's gender but later clarified is male.

The perpetrator reportedly posted disturbing content on social media

semiautomatic rifle, semiautomatic handgun

https://6abc.com/philly-mass-shooting-suspect-charged-with-5-counts-of-murder/13463565/; https://www.nytimes.com/2023/07/04/us/five-people-dead-philaldelphia-shooting.html; https://www.cnn.com/2023/07/05/us/philadelphia-mass-shooting-victims/index.html; https://www.cnn.com/2023/07/04/us/philadelphia-shooting-motive-suspect-tuesday/index.html

https://6abc.com/philly-mass-shooting-suspect-charged-with-5-counts-of-murder/13463565/; https://www.nytimes.com/2023/07/05/us/philadelphia-shooting-suspect-kimbrady-carriker.html

Farmington, New Mexico

Beau Wilson, 18, opened fire in a residential neighborhood around his home; he shot randomly at people, houses and cars, according to local authorities. A high school student, he wore body armor and used multiple guns, including an "AR-15-style rifle," and was shot dead by responding police.

semiautiomatic rifle; semiautomatic pistol

https://www.cbsnews.com/news/farmington-shooting-new-mexico-suspect-dead/; https://www.cnn.com/2023/05/16/us/farmington-new-mexico-shooting-tuesday/index.html; https://www.nbcnews.com/news/us-news/beau-wilson-teen-killed-three-women-mental-health-issues-rcna84884

Mauricio Garcia, 33, wore tactical gear and used an AR-15 to open fire outside a shopping mall in the city just north of Dallas; he was shot dead by a police officer who was nearby and responded to the attack. Investigators found evidence Garcia may have been motivated in part by far-right extremist ideology.

Reportedly had a history of mental health problems that led to the end of his military service

https://www.nytimes.com/2023/05/07/us/texas-mall-shooting-allen.html; https://www.washingtonpost.com/nation/2023/05/07/allen-mall-shooter-mauricio-garcia/; https://www.washingtonpost.com/nation/2023/05/07/texas-allen-outlets-shooting-dallas/; https://www.nytimes.com/2023/05/08/us/texas-mall-shooting-mauricio-garcia.html; https://www.cnn.com/2023/05/08/us/allen-texas-mall-shooting-gunman-monday/index.html

Connor Sturgeon, 25, opened fire inside Old National Bank, killing and injuring multiple victims, including responding police officers; he died in a shootout with police. He told at least one person before the attack that he was suicidal, and left a note that he intended to open fire at the bank, according to local authorities.

gun dealership in Louisville

https://apnews.com/article/downtown-louisville-shooting-dc7b45a9c5d2b384a16d653864f8b735; https://www.cnn.com/us/live-news/louisville-kentucky-shooting-04-10-23/h_b084de40349360baa53309aed0393a4f; https://www.nytimes.com/2023/04/11/us/louisville-shooting-gunman.html

Audrey Hale, 28, who was a former student at the private Covenant School (pre-school; K-6), killed three adults and three 9-year-old children, before being shot dead by responding police.

semiautomatic rifle, semiautomatic handgun

F ("identifies as transgender" and "Audrey Hale is a biological woman who, on a social media profile, used male pronouns,” according to Nashville Metro PD officials)

https://www.tennessean.com/story/news/crime/2023/03/27/nashville-mourns-mass-shooting-covenant-school/70052585007/; https://www.wsmv.com/2023/03/27/vumc-3-students-2-adults-dead-police-say-shooter-also-dead-covenant-school/; https://www.washingtonpost.com/nation/2023/03/27/nashville-shooting-covenant-school/; https://www.nytimes.com/live/2023/03/27/us/nashville-shooting-covenant-school; https://www.nytimes.com/article/nashville-school-shooting-tennessee.html; https://www.washingtonpost.com/nation/2023/03/27/nashville-school-shooting/

Anthony D. McRae, 43, opened fire at Berkey Hall and the MSU union, according to local police. Following an intense manhunt in the area, he was found dead from a self-inflicted gunshot wound, police said.

semiautomatic handguns

https://www.cnn.com/us/live-news/michigan-state-university-shooting-updates-2-13-23/index.html; https://www.freep.com/story/news/local/michigan/2023/02/13/michigan-state-shooting-what-we-know-about-shots-fired-on-campus/69901251007/; https://abcnews.go.com/US/anthony-mcrae-suspected-michigan-state-shooter/story?id=97195504; https://www.nytimes.com/2023/02/16/us/michigan-state-shooting-professor-berkey-hall.html?referringSource=articleShare

Half Moon Bay, California

Chunli Zhao, 67, suspected of carrying out the attacks at a mushroom farm and near a trucking facility, was apprehended by police. Zhao reportedly worked at the mushroom farm.

semiautomatic handgun

https://www.cnn.com/us/live-news/half-moon-bay-california-shooting-1-23-23/index.html; https://www.washingtonpost.com/nation/2023/01/23/half-moon-bay-shooting-california-suspect-farm/

Monterey Park, California

Huu Can Tran, 72, fled the scene in a white van and later shot himself to death as police closed in.

According to the LA Times, "Two law enforcement sources said the suspect recently showed up to the Hemet police station saying his family was trying to poison him."

semiautomatic assault weapon (Details pending)

https://www.latimes.com/california/story/2023-01-22/la-me-monterey-park-mass-shooting; https://www.washingtonpost.com/nation/2023/01/22/monterey-park-california-shooting/

Andre Bing, 31, who worked as a supervisor at the store, opened fire on co-workers and then fatally shot himself, according to local authorities.

semiautomatic handgun

https://www.washingtonpost.com/dc-md-va/2022/11/23/andre-bing-walmart-shooting-employee/; https://www.wavy.com/news/local-news/chesapeake/police-respond-to-shooting-at-chesapeake-walmart/; https://www.nbcnews.com/news/us-news/multiple-fatalities-shooting-virginia-walmart-police-say-rcna58488

Colorado Springs, Colorado

Anderson L. Aldrich, 22, wore body armor and opened fire upon entering the club as a dance party was underway; he was subdued by unarmed patrons who tackled him amid the carnage and held him down until police arrived.

Aldrich reportedly had a history of menacing behavior and violent threats.

semiautomatic rifle; semiautomatic handgun

https://coloradosun.com/2022/11/20/club-q-shootins-colorado-springs/; https://www.washingtonpost.com/nation/2022/11/20/colorado-springs-lgbtq-clubq-shooting/; https://www.nytimes.com/2022/11/20/us/colorado-springs-shooting-suspect-charges.html; https://www.nytimes.com/2022/11/20/us/colorado-springs-shooting.html

Christopher Darnell Jones Jr., 22, allegedly opened fire after a charter bus returned to campus from a university field trip, killing three members of the UVA football team and injuring two other people. Jones Jr. reportedly was on the radar of the university's threat assessment team regarding talk of owning a gun and a prior 2021 incident involving a concealed weapon.

Dance's Sporting Goods; Colonial Heights, VA

Glock 45 9mm; Ruger AR-556 rifle (in his dorm room, with other weapons, gear, and ammo)

https://dailyprogress.com/news/local/guns-and-ammunition-seized-from-jones-uva-dormitory-room/article_af765148-66c7-11ed-b27c-a362fa328595.html; https://www.washingtonpost.com/nation/2022/11/13/shooting-university-virginia-charlottesville/; https://www.washingtonpost.com/dc-md-va/2022/11/14/christopher-darnell-jones-uva-gunman/; https://www.13newsnow.com/article/news/crime/uva-shooting-victims-devin-chandler-lavel-davis-dsean-perry/291-193cbb8a-9ca0-4fa3-a463-eafbce219c6b

Hedingham, North Carolina

Austin Thompson, 15, went on a rampage in the Hedingham neighborhood, where he lived; one of the fatalities included his 16-year-old brother, James. Thompson was critically wounded and apprehended by police after a long standoff, and was admitted to an area hospital in critical condition.

https://www.newsobserver.com/news/local/crime/article267301562.html; https://www.newsobserver.com/news/local/crime/article267287397.html; https://www.nytimes.com/2022/10/13/us/raleigh-shooting.html; https://www.washingtonpost.com/nation/2022/10/13/north-carolina-shooting-raleigh/

Jonathan Sapirman, 20, opened fire in a mall food court and was soon shot dead by a 22-year-old armed civilian, whose response local authorities called "nothing short of heroic."

semiautomatic rifles; semiautomatic handgun

Sig Sauer M400 rifle

https://apnews.com/article/indiana-mall-shooting-345348912b288dce656083b2422c2fde; https://www.washingtonpost.com/nation/2022/07/17/indiana-mall-shooting-greenwood-park/; https://www.nytimes.com/2022/07/18/us/greenwood-indiana-mall-shooting.html

Suspected gunman Robert "Bobby" Crimo, 21, allegedly opened fire with a rifle from a rooftop during an Independence Day parade, unleashing several bursts of rapid fire, and then escaped from the scene as police responded. He was taken into custody about eight hours later, a few miles from the scene of the attack, following a large-scale manhunt by law enforcement. (*Further details pending.)

legally purchased by the shooter in the "greater Chicago area" per authorities

AR-15 style rifle, possibly modified for rapid fire

https://www.cbsnews.com/chicago/news/suspect-in-custody-highland-park-july-4-parade-mass-shooting-active-shooter-at-large-person-of-interest-robert-bobby-crimo-iii-photo-released/; https://www.washingtonpost.com/politics/2022/07/04/fatal-shooting-independence-day-parade/; https://www.wsj.com/articles/alleged-highland-park-shooter-acquired-gun-legally-officials-say-11657033049; https://chicago.suntimes.com/2022/7/6/23196101/highland-park-mass-shooting-suspect-robert-crimo-iii-ordered-held-without-bond

Robert Findlay Smith, 70, opened fire with a handgun at a potluck dinner and was subdued by a church member until police arrived to apprehend him.

semiautomatic handgun

Joe Louis Esquivel, 23, shot four coworkers and was captured a short time later after a shootout with police.

semiautomatic handgun

https://www.washingtonpost.com/dc-md-va/2022/06/09/smithsburg-shooting-maryland/; https://www.wusa9.com/article/news/local/maryland/new-details-emerge-in-deadly-smithsburg-manufacturing-plant-shooting-maryland-gun-violence/65-50b7f001-f903-4a16-bbd1-69d0c6286234; https://www.fox5dc.com/news/joe-louis-esquivel-charged-with-murder-in-smithsburg-manufacturing-facility-shooting

Michael Louis, 45, killed four, including two doctors, and took his own life, according to authorities. "The gunman, who the chief said fatally shot himself, had been carrying a letter saying he blamed his surgeon for continuing back pain and intended to kill him and anyone who got in the way," according to the New York Times. Louis purchased the AR-15-style rifle he used the day of the attack, according to city Police Chief Wendell Franklin.

semiautomatic rifle; semiautomatic handgun

AR-15 style rifle; .40 caliber Smith & Wesson pistol

https://www.nytimes.com/live/2022/06/01/us/tulsa-shooting-oklahoma-news; https://www.cnn.com/2022/06/02/us/tulsa-hospital-shooting-thursday/index.html; https://www.washingtonpost.com/nation/2022/06/02/tulsa-shooting-news-medical-center/; https://nypost.com/2022/06/02/ar-15-used-in-tulsa-shooting-purchased-that-same-day-report/; https://tulsaworld.com/news/local/saint-francis-mass-shooter-a-few-details-about-michael-louis-emerge/article_5e68ed7c-e695-11ec-8a94-33bb615757b5.html

Salvador Ramos, 18, was identified by authorities as the suicidal gunman who attacked at Robb Elementary school.

https://abcnews.go.com/US/texas-elementary-school-reports-active-shooter-campus/story?; https://www.nytimes.com/live/2022/05/24/us/shooting-robb-elementary-uvaldeid=84940951; https://www.houstonchronicle.com/news/houston-texas/texas/article/Uvalde-school-shooting-Texas-17196069.php

Payton S. Gendron, 18, committed a racially motivated mass murder, according to authorities. He livestreamed the attack and was apprehended by police.

previous threats and a mental health evaluation prompted by state police investigation in June 2021

Bushmaster XM-15 semiautomatic rifle

https://www.nytimes.com/live/2022/05/15/nyregion/shooting-buffalo-ny; https://www.washingtonpost.com/investigations/2022/05/15/buffalo-shooting-gun-bought-bushmaster/; https://apnews.com/article/buffalo-supermarket-shooting-442c6d97a073f39f99d006dbba40f64b

"A man believed to be meeting his three children for a supervised visit at a church just outside Sacramento on Monday afternoon fatally shot the children and an adult accompanying them before killing himself, police officials said. Sheriff Scott Jones of Sacramento County told reporters at the scene that the gunman had a restraining order against him, and that he had to have supervised visits with his children, who were younger than 15." (NYTimes)

AR-15-style "ghost gun"

https://www.nytimes.com/2022/02/28/us/church-shooting-sacramento.html; https://www.latimes.com/california/story/2022-02-28/sacramento-county-church-mass-shooting-children-killed; https://www.kcra.com/article/gunman-who-killed-3-daughters-in-sacramento-county-church-was-in-us-illegally/39330254

Ethan Crumbley, a 15-year-old student at Oxford High School, opened fire with a Sig Sauer 9mm pistol purchased four days earlier by his father, and was apprehended by police shortly thereafter. Prosecutors filed charges against Crumbley for terrorism and first-degree murder.

semiautomatic handgun

Sig Sauer 9mm pistol

https://www.washingtonpost.com/nation/2021/11/30/oxford-high-school-shooting/; https://www.cnn.com/videos/us/2021/11/30/michigan-high-school-shooting-supect-custody-vpx.cnn; https://www.nytimes.com/live/2021/12/01/us/school-shooting-michigan

Samuel Cassidy, 57, a Valley Transportation Authorty employee, opened fire at a union meeting at the light rail facility, soon also fatally shooting himself at the scene. Before the attack, Cassidy had set fire to his own house, where he also had firearms and a stockpile of ammunition. His legal history included his ex-wife filing a restraining order against him in 2009.

Perpetrator had a history of depression, angry behavior and making people around him fearful; former intimate partners decribed him as being mentally unstable

semiautomatic handguns

https://www.sfchronicle.com/crime/article/Mass-shooting-in-San-Jose-What-we-know-so-far-16204689.php; https://apnews.com/article/san-jose-shootings-873c4d8b0189f3f985ab3bc31ae5837f; https://www.washingtonpost.com/nation/2021/05/26/san-jose-shooting/; https://www.latimes.com/california/story/2021-05-26/police-swarm-active-shooter-incident-in-san-jose; https://www.washingtonpost.com/nation/2021/05/27/san-jose-shooting/; https://apnews.com/article/california-business-shootings-2ac840b7cc77cc9e408a5d6daa7e7e30; https://www.nytimes.com/2021/05/27/us/san-jose-shooting.html

Brandon Scott Hole, 19, opened fire around 11 p.m. in the parking lot and inside the warehouse, and then shot himself fatally as police responded to the scene.

Perpetrator had been reported to police in 2020 by his mother as potentially suicidal; he was detained by authorities on a temporary mental health hold

https://www.indystar.com/story/news/crime/2021/04/16/indianapolis-fedex-shooting-gunman-parked-car-and-began-randomly-firing-police-say/7251130002/; https://www.washingtonpost.com/nation/2021/04/16/indianapolis-fedex-shooting-airport/; https://apnews.com/article/fedex-indianapolis-mass-shooting-e92ad3117c56357b3b2c71a2903e68a8; https://www.nytimes.com/2021/04/19/us/indianapolis-shooting-red-flag-law.html

Aminadab Gaxiola Gonzalez, 44, allegedly opened fire inside a small business at an office complex, killing at least four victims, including a nine-year-old boy, before being wounded in a confrontation with police and taken into custody. According to law enforcement officials, Gonzalez had chained the front and rear gates to the complex with bicycle cable locks to hinder police response.

semiautomatic handgun

https://www.latimes.com/california/story/2021-03-31/orange-mass-shooting-reported; https://www.ocregister.com/2021/03/31/orange-shooting-draws-large-police-response-multiple-victims-found/; https://www.sandiegouniontribune.com/news/california/story/2021-04-01/police-california-office-attack-that-killed-4-wasnt-random

Ahmad Al Aliwi Alissa, 21, carried out a mass shooting at a King Soopers that left 10 victims dead, including veteran police officer Eric Talley, who was the first officer to respond on the scene. Alissa was wounded by police and taken into custody.

Brother described him as paranoid; multiple accounts of anger issues from others who knew him. Misdemeanor criminal record for a violent assault during his senior year in high school.

semiautomatic rifle, semiautomatic handgun; tactical vest

Ruger AR-556; weapon was purchased six days before the attack

https://www.denverpost.com/2021/03/22/police-active-shooter-shooting-king-soopers-boulder/; https://www.cnn.com/2021/03/23/us/boulder-colorado-shooting-suspect/index.html; https://www.nbcnews.com/news/us-news/man-charged-10-counts-first-degree-murder-after-shooting-colorado-n1261808; https://www.latimes.com/world-nation/story/2021-03-22/police-responding-to-active-shooter-at-colorado-supermarket; https://denver.cbslocal.com/2021/03/25/grocery-store-shooting-who-is-ahmad-al-issa-ahmad-al-aliwi-alissa/; https://www.nytimes.com/2021/03/27/us/boulder-gunman-alissa.html

Robert Aaron Long, 21, killed eight people at three massage parlors. An additional victim was injured. Six of the deceased victims were women of Asian descent. According to law enforcement officials, Long, who is white, made claims in custody about having sexual addiction issues, and had frequented the massage parlors. He also spoke of intent to attack additional locations in Florida.

semiautomatic handgun

https://www.ajc.com/news/breaking-multiple-shootings-shut-down-busy-woodstock-highway/OLE23RVIO5BE3ELWBZAA6GVSSA/; https://www.nytimes.com/2021/03/16/us/atlanta-shootings-massage-parlor.html; https://www.washingtonpost.com/nation/2021/03/16/atlanta-spa-shootings/; https://apnews.com/article/georgia-massage-parlor-shootings-leave-8-dead-f3841a8e0215d3ab3d1f23d489b7af81; https://www.wsj.com/articles/who-is-robert-aaron-long-atlanta-shooting-suspect-11615995416

Springfield convenience store shooting

Joaquin S. Roman, 31, went on a rampage culminating at a Kum & Go, killing four people, including a police officer, before fatally shooting himself on the scene.

semiautomatic rifle; semiautomatic handgun

SKS 7.62-caliber rifle; Glock 9mm

https://www.kiro7.com/news/trending/ive-been-shot-audio-paints-frantic-picture-shooting-that-killed-missouri-officer-3-others/THC32OGO75BR7FLTMXL4VUFYFE/; https://www.nytimes.com/2020/03/16/us/springfield-missouri-shooting.html; https://www.nytimes.com/2020/03/21/us/coronavirus-springfield-missouri-shooting.html; https://www.news-leader.com/story/news/crime/2020/04/08/springfield-kum-and-go-shooting-police-seize-ammo-shooter-apartment/2968217001/

Anthony Ferrill, 51, an employee armed with two handguns, including one with a silencer, opened fire on the Milwaukee campus of the beer company, killing five people and then committing suicide. According to the Milwaukee Journal Sentinel, Ferrill "had been involved in a long-running dispute with a co-worker that boiled over" in the run-up to the attack.

semiautomatic handgun

https://www.jsonline.com/story/news/local/2020/02/26/active-shooter-reported-molsoncoors-campus-unknown-injuries/4884282002/; https://www.cnn.com/2020/02/26/us/milwaukee-critical-incident/index.html; https://www.nytimes.com/2020/02/26/us/milwaukee-shooting-miller-coors.html; https://www.jsonline.com/story/news/politics/2020/02/28/milwaukee-molson-coors-shooting-gwen-moore-says-victim-old-friend/4902693002/

David N. Anderson, 47, and Francine Graham, 50, were heavily armed and traveling in a white van when they first killed a police officer in a cemetery, and then opened fire at a kosher market, “fueled both by anti-Semitism and anti-law enforcement beliefs,” according to New Jersey authorities. The pair, linked to the antisemitic ideology of the Black Hebrew Israelites extremist group, were killed after a lenghty gun battle with police at the market.

semiautomatic rifle; shotgun; semiautomatic handguns

AR-15-style rifle; Mossberg 12-gauge shotgun; 9mm Ruger pistol, 9mm Glock 17

https://www.nytimes.com/2019/12/15/nyregion/jersey-city-shooting-terrorism.html; https://twitter.com/fbimostwanted/status/1205621200505802752?s=21; https://www.nytimes.com/2019/12/12/nyregion/jersey-city-shooting-domestic-terrorism.html?smid=nytcore-ios-share; https://www.nytimes.com/2019/12/11/nyregion/jersey-city-shooting.html; https://www.nj.com/hudson/2019/12/jersey-city-shooters-had-tremendous-amount-of-firepower-attack-investigated-as-domestic-terror-ag-says.html

Ahmed Mohammed al-Shamrani, 21, a Saudi Arabian military pilot training in the United States, opened fire just before 7 a.m. in an air station classroom. He was soon shot and killed by responding Florida sheriff’s deputies.

semiautomatic handgun

https://www.washingtonpost.com/national-security/2019/12/06/naval-station-pensacola-active-shooter/; https://www.cnn.com/us/live-news/pensacola-naval-base-shooter/index.html

Seth A. Ator, 36, fired at police officers who stopped him for a traffic violation, and then went on a driving rampage in the Odessa-Midland region, where he also shot a postal worker and stole her vehicle. He was shot dead by law enforcement responding to the rampage. Ator had been fired from a job just prior to the attack (though per the FBI he had shown up to that job "already enraged"). He had a criminal record and "a long history of mental problems and making racist comments," according to a family friend who spoke to the media.

"One friend of the family said the gunman had a long history of mental problems, trouble with the law and making racist comments," according to a report in the New York Times.

https://www.washingtonpost.com/politics/5-killed-21-injured-after-suspect-hijacked-a-mail-truck-in-odessa-texas/2019/08/31/f659da2c-cc3c-11e9-be05-f76ac4ec618c_story.html; https://www.chron.com/news/texas/article/Police-Multiple-gunshot-victims-from-Texas-14404855.php; https://www.nytimes.com/2019/09/01/us/death-toll-texas-shooting.html; https://www.washingtonpost.com/nation/2019/09/02/texas-gunman-who-killed-was-fired-job-day-rampage/; https://www.cnn.com/2019/09/02/us/west-texas-shooting-monday/index.html

Connor Betts, 24, died during the attack, following a swift police response. He wore tactical gear including body armor and hearing protection, and had an ammunition device capable of holding 100 rounds. Betts had a history of threatening behavior dating back to high school, including reportedly having hit lists targeting classmates for rape and murder.

AR-15-style rifle, with a 100-round capacity ammunition drum

https://www.nytimes.com/2019/08/04/us/dayton-ohio-shooting.html; https://www.nytimes.com/2019/08/04/us/mass-shootings-dayton-el-paso.html; https://www.washingtonpost.com/nation/2019/08/04/nine-fatally-shot-dayton-including-suspect-day-after-mass-shooting-texas/; https://www.washingtonpost.com/national/police-chief-it-seems-to-defy-believability-that-dayton-shooter-would-kill-his-own-sister/2019/08/05/920a895c-b79e-11e9-b3b4-2bb69e8c4e39_story.html; https://www.cnn.com/2019/08/05/us/connor-betts-dayton-shooting-profile/index.html

Patrick Crusius, 21, who was apprehended by police, posted a so-called manifesto online shortly before the attack espousing ideas of violent white nationalism and hatred of immigrants. "This attack is a response to the Hispanic invasion of Texas," he allegedly wrote in the document.

AK-47-style rifle, per authorities

https://www.washingtonpost.com/nation/2019/08/04/investigators-search-answers-after-gunman-kills-el-paso/; https://www.nytimes.com/2019/08/04/us/mass-shootings-dayton-el-paso.html; https://www.apnews.com/5fb2144947974631912d1efa889f932b

Santino William LeGan, 19, fired indiscriminately into the crowd near a concert stage at the festival. He used an AK-47-style rifle, purchased legally in Nevada three weeks earlier. After apparently pausing to reload, he fired additional multiple rounds before police shot him and then he killed himself. A witness described overhearing someone shout at LeGan, "Why are you doing this?" LeGan, who wore camouflage and tactical gear, replied: “Because I'm really angry." The murdered victims included a 13-year-old girl, a man in his 20s, and six-year-old Stephen Romero.

Nevada, on July 9

AK-47-style rifle, per authorities

https://www.cbsnews.com/live-news/garlic-festival-mass-shooting-gilroy-california-victims-suspect-santino-william-legan-live-updates/; https://www.sfgate.com/news/article/Report-Suspect-ID-in-Gilroy-Garlic-Festival-14192736.php; https://www.nytimes.com/2019/07/29/us/gilroy-festival-shooting.html; https://www.latimes.com/california/story/2019-07-29/what-we-know-about-gilroy-garlic-festival-shooting-suspect-santino-william-legan; https://www.washingtonpost.com/nation/2019/07/29/multiple-people-reportedly-injured-shooting-california-food-festival/; https://heavy.com/news/2019/07/santino-william-legan/; https://www.cnn.com/2019/08/06/us/gilroy-festival-shooting/index.html

Virginia Beach municipal building shooting

DeWayne Craddock, 40, a municipal city worker wielding handguns, a suppressor and high-capacity magazines, killed en masse inside a Virginia Beach muncipal building late in the day on a Friday, before dying in a prolonged gun battle with police. Craddock reportedly had submitted his resignation from his job that morning. He was a veteran of the Virginia Army National Guard, and "had a shaved head, bodybuilder’s physique and cameras in the windows of his house on a peaceful cul-de-sac," according to the Washington Post.

.45-caliber handguns; noise suppressor (silencer); several high-capacity magazines

https://www.washingtonpost.com/local/public-safety/virginia-beach-officials-expect-to-release-additional-details-of-mass-shooting/2019/06/02/a001b856-852f-11e9-a870-b9c411dc4312_story.html; https://pilotonline.com/news/local/virginia-beach-mass-shooting/article_e15ea290-853f-11e9-aa50-93751bba3c3b.html; https://pilotonline.com/news/local/virginia-beach-mass-shooting/article_c8353020-84a1-11e9-aa12-d3bf967368c4.html; https://www.npr.org/2019/06/04/729413913/do-extended-magazines-facilitate-mass-shootings; https://www.nbcnews.com/news/us-news/virginia-beach-shooter-killed-12-using-silencer-high-capacity-magazine-n1012771

Gary Martin, 45, went on a rampage inside the warehouse in response to being fired from his job and died soon thereafter in a shootout with police. Among his victims were five dead coworkers and five injured police officers. Martin had a felony record and lengthy history of domestic violence; he was able to obtain a gun despite having had his Illinois firearms ownership identification card revoked. According to a report from prosecutors, Martin told a co-worker the morning of the shooting that if he was fired he was going to kill employees and police.

Smith & Wesson handgun, with a green sighting laser

https://www.washingtonpost.com/nation/2019/02/16/man-kills-five-warehouse-shooting-spree-shortly-after-being-fired-illinois-police-say/?utm_term=.9863ec4ffc41; https://www.cnn.com/2019/02/17/us/aurora-shooting-termination/index.html; https://www.wsj.com/articles/companies-roll-out-gunshot-detectors-at-the-office-11550575801; https://www.cbsnews.com/news/gary-martin-aurora-illinois-plant-gunman-threatened-violence-if-fired-prosecutors-say/

State College, Pennsylvania

Jordan Witmer, 21, shot three people at a Ramada Hotel bar near Penn State University, including a former girlfriend he was there with. He then fled the bar, crashed his car about a mile away, and stormed into a random house, fatally shooting an elderly resident and then himself. Witmer, who had a legal carry permit for his handgun, had just finished a three-year stint in the US Army; ten days prior to the attack he had been convicted on drunk driving-related charges in Kentucky, where he'd been stationed.

http://www.wistv.com/2019/01/26/details-emerge-about-shooting-rampage-near-penn-state/; https://www.pennlive.com/news/2019/01/state-college-shooter-pleaded-guilty-to-dui-crash-charges-days-before-killings.html; https://www.pennlive.com/news/2019/01/man-who-killed-3-in-state-college-wanted-to-be-a-cop-relatives-say.html

Zephen A. Xaver, 21, fatally shot five women inside a bank and then called the police to confess. He was armed with a handgun and wore a bulletproof vest. He reportedly ordered the women to lie down on the floor and shot them execution-style. After a standoff with police, he surrendered and was taken into custody. A week prior, Xaver had quit a job as a prison guard trainee, and authorities said they believed the shooting was "a random act" and that roberry did not appear to be a motive. An ex-girlfriend in Indiana told local media she'd been “scared for years” by Xaver’s talk of violence and death, but that her warnings to others (who she did not identify) were not taken seriously. She said she’d first met Xaver in a psychiatric hospital in 2013. In March 2017, Michigan State Police documented an incident in which Xaver indicated he was “possibly thinking of suicide by cop and taking hostages."

Xaver was reported to have a lenghty history of expressing violent desires; an ex-girlfriend said she first met him at a psychiatric hospital in 2013.

https://wsbt.com/news/local/classmate-says-florida-bank-shooter-who-allegedly-killed-5-attended-bremen-high-school; https://www.washingtonpost.com/nation/2019/01/23/several-people-shot-after-gunman-barricades-himself-florida-bank-authorities-say/; https://www.wptv.com/news/state/accused-bank-shooter-zephen-xaver-fascinated-with-violence-ex-girlfriend-says; https://www.npr.org/2019/01/24/688183605/man-charged-with-murder-after-allegedly-killing-5-women-at-suntrust-bank-in-flor; https://www.wesh.com/article/sebring-bank-shooting-latest/26012533; https://www.apnews.com/c3523d282b2942739240731daaf797c2

https://wsbt.com/news/local/classmate-says-florida-bank-shooter-who-allegedly-killed-5-attended-bremen-high-school; https://www.washingtonpost.com/nation/2019/01/23/several-people-shot-after-gunman-barricades-himself-florida-bank-authorities-say/

Juan Lopez, 32, confronted his former fiancé, ER doctor Tamara O'Neal, before shooting her and opening fire on others at the hospital, including a responding police officer, Samuel Jimenez, and a pharmacy employee, Dayna Less. Lopez was fatally shot by a responding SWAT officer. Lopez had a history of domestic abuse against an ex-wife, and was kicked out of a fire department training academy for misconduct against female cadets.

semiautomatic handgun

https://www.cnn.com/2018/11/19/us/mercy-hospital-chicago-shooting/index.html; https://www.chicagotribune.com/news/local/breaking/ct-met-shooting-mercy-hospital-chicago-20181119-story.html; https://6abc.com/chicago-shooting-4-dead-including-officer-gunman/4720955/; https://chicago.cbslocal.com/2018/11/19/mercy-hospital-gunman-officer-killed; https://abc7ny.com/mercy-hospital-chicago-shooting-4-dead-including-officer-gunman/4720765/; https://abc7chicago.com/mercy-hospital-gunman-what-we-know/4725117/

Thousand Oaks, California

Ian David Long, 28, dressed in black and armed with a handgun and a “smoke device,” approached the Borderline Bar & Grill — a country music venue popular with college students — close to midnight and opened fire, killing a security guard and then others in the club, including a sheriff’s deputy responding to the attack. Long was found dead at the scene from apparent suicide. He was a former Marine and had a history of interactions with local law enforcement, including a mental health evaluation in which he’d been cleared.

Per the LATimes: "Sheriff Geoff Dean said his department had had several interactions with Long, including a call to his home in April for a complaint of disturbing the peace. Deputies at the time said Long was irate and acting irrationally, Dean said. They called in mental health professionals to evaluate him, and they concluded he did not need to be taken into custody."

A gun store in Simi Valley

semiautomatic handgun

Glock 21, .45 caliber; high-capacity magazine

http://www.latimes.com/local/lanow/la-me-ln-thousand-oaks-20181107-story.html; https://www.washingtonpost.com/nation/2018/11/08/multiple-injuries-reported-bar-shooting-thousand-oaks-calif/; https://www.nytimes.com/2018/11/08/us/shooting-california-thousand-oaks.html; https://www.nytimes.com/2018/11/08/us/ian-david-long-california-shooter.html; https://www.wsj.com/articles/multiple-injuries-reported-in-bar-shooting-in-thousand-oaks-california-1541666907

Pittsburgh, Pennsylvania

Robert D. Bowers, 46, shouted anti-Semitic slurs as he opened fire inside the Tree of Life synagogue during Saturday morning worship. He was armed with an assault rifle and multiple handguns and was apprehended after a standoff with police. His social media accounts contained virulent anti-Semitic content, and references to migrant caravan "invaders" hyped by President Trump and the Republican party ahead of the 2018 midterms elections.

(Unclear; investigators confirmed he owned 10 guns in total, all purchased and possessed legally, and had a handgun license)

semiautomatic rifle; semiautomatic handguns

AR-15; Glock .357 (3)

https://www.nytimes.com/2018/10/27/us/active-shooter-pittsburgh-synagogue-shooting.html; https://www.cnn.com/us/live-news/pittsburgh-synagogue-shooting/h_0c180f52c8d032fd47eef570cc5065c2; https://www.nytimes.com/2018/10/30/us/ar15-gun-pittsburgh-shooting.html

Snochia Moseley, 26, reportedly a disgruntled employee, shot her victims outside the building and on the warehouse floor; she later died from a self-inflicted gunshot at a nearby hospital. (No law enforcement officers responding to her attack fired shots.)

semiautomatic handgun

http://www.baltimoresun.com/news/maryland/crime/bs-md-harford-shooting-20180920-story.html; https://www.washingtonpost.com/local/public-safety/maryland-sheriffs-office-says-multiple-victims-in-shooting/2018/09/20/9d2c6464-bcda-11e8-be70-52bd11fe18af_story.html; https://www.cnn.com/2018/09/20/us/maryland-shooting/index.html; https://heavy.com/news/2018/09/snochia-moseley/

Javier Casarez, 54, who was going through a bitter divorce, went on a shooting spree targeting his ex-wife and former coworkers at the trucking company. His attack included fatally shooting one victim who he pursued to a nearby sporting goods retailer, and two others at a private residence. After then carjacking a woman who was driving with a child (and letting the two go), Casarez fatally shot himself as law enforcement officials closed in on him.

Smith & Wesson Model 500 (.50-caliber revolver)

http://www.latimes.com/local/lanow/la-me-bakersfield-mass-shooting-20180914-story.html; https://www.cnn.com/2018/09/13/us/california-shootings-multiple-dead/index.html; https://www.bakersfield.com/ex-wife-in-mass-shooting-had-just-filed-for-child/article_8d7510c2-bc38-11e8-bc73-c3793e2ec681.html

Omar Enrique Santa Perez, 29, walked into the ground-floor lobby of a building in downtown Cincinnati shortly after 9 a.m. and opened fire. Within minutes, Perez was fatally wounded in a shootout with law enforcement officers responding to the scene.

Perez filed a "delusional" lawsuit in 2017 against CNBC and TD Ameritrade; the federal judge who threw out the case said Perez's allegations were "rambling, difficult to decpipher and borders on delusional."

semiautomatic handgun

https://www.cnn.com/2018/09/07/us/cincinnati-shooting/index.html; https://www.cincinnati.com/story/news/crime/crime-and-courts/2018/09/06/omar-santa-perez-cincinnati-shooter-filed-lawsuit-against-cnbc/1217643002/; https://www.cincinnati.com/story/news/2018/09/07/cincinnati-shooting-what-we-know-suspect/1221725002/; https://www.cincinnati.com/story/news/2018/09/06/cincinnati-shooting-suspect-arrested-south-carolina-2014/1218729002/; https://www.cincinnati.com/story/news/crime/2018/09/07/why-cincinnati-shooter-allowed-have-gun/1221091002/

Jarrod W. Ramos, 38, shot through the glass doors of the paper’s newsroom around 3pm to carry out his attack; police quickly responding to the scene found him hiding under a desk and apprehended him. Ramos had harbored a longstanding grudge against the paper over a 2011 column that had detailed his guilty plea for the harassment of a former female classmate. Ramos had sued the paper for defamation and lost.

12-gauge pump-action shotgun

http://www.capitalgazette.com/news/annapolis/bs-md-gazette-shooting-20180628-story.html; http://www.capitalgazette.com/news/for_the_record/bs-md-ramos-charges-20180629-story.html; https://www.nytimes.com/2018/06/28/us/capital-gazette-annapolis-shooting.html; https://www.washingtonpost.com/local/public-safety/heavy-police-activity-reported-around-capital-gazette-newsroom-in-annapolis/2018/06/28/32e0123e-7b05-11e8-93cc-6d3beccdd7a3_story.html?utm_term=.e8fb121510f7; https://www.washingtonpost.com/local/public-safety/five-dead-in-shooting-at-capital-gazette-paper-suspect-in-custody/2018/06/29/374b0292-7b7e-11e8-aeee-4d04c8ac6158_story.html

Dimitrios Pagourtzis, a 17-year-old student, opened fire at Santa Fe High School with a shotgun and .38 revolver owned by his father; Pagourtzis killed 10 and injured at least 13 others before surrendering to authorities after a standoff and additional gunfire inside the school. (Pagourtzis reportedly had intended to commit suicide.) Investigators also found undetonated explosive devices in the vicinity. (FURTHER DETAILS PENDING.)

Father's weapons

https://www.chron.com/news/houston-texas/article/Shots-fired-at-Santa-Fe-High-School-12925050.php; https://www.nytimes.com/2018/05/18/us/school-shooting-santa-fe-texas.html; https://www.aol.com/article/news/2018/05/21/suspected-texas-gunman-studied-previous-mass-shootings-report/23439884/

https://www.chron.com/news/houston-texas/article/Shots-fired-at-Santa-Fe-High-School-12925050.php; https://www.nytimes.com/2018/05/18/us/school-shooting-santa-fe-texas.html; https://www.aol.com/article/news/2018/05/21/suspected-texas-gunman-studied-previous-mass-shootings-report/23439884/

Travis Reinking, 29, opened fire around 3:30 a.m. in the parking lot of a Waffle House in Antioch, and continued shooting as he entered the restaurant. As he attempted to reload his AR-15, a bystander heroically wrestled the rifle away from Reinking, who then fled; he was captured by authorities the following day. Reinking had a history of erratic behavior and run-ins with law enforcement in his home state of Illinois, including claims that he was being stalked and harassed by pop star Taylor Swift. In July 2017, he was arrested at the White House after breaching security in an effort to speak with President Trump, reportedly claiming his right to do so as “a sovereign citizen.”

Reinking had a history of erratic behavior and run-ins with law enforcement in his home state of Illinois, including claims that he was being stalked and harassed by pop star Taylor Swift. In July 2017, he was arrested at the White House after breaching security in an effort to speak with President Trump, reportedly claiming his right to do so as “a sovereign citizen.”

https://www.washingtonpost.com/news/post-nation/wp/2018/04/23/waffle-house-shooting-travis-reinking-manhunt-continues-nashville-police-say/?utm_term=.69579db5fdc6; https://www.tennessean.com/story/news/2018/04/23/waffle-house-shooting-travis-reinking-search-continues-antioch-nashville/541313002/; https://www.nytimes.com/2018/04/23/us/waffle-house-shooting-nashville.html; https://www.buzzfeed.com/briannasacks/this-is-what-we-know-about-the-suspected-waffle-house-gunman?utm_term=.ilj2Knad6#.lklzyb3vj; http://www.wkrn.com/news/manhunt-continues-for-gunman-who-killed-4-at-antioch-waffle-house/1134986998

https://www.washingtonpost.com/news/post-nation/wp/2018/04/23/waffle-house-shooting-travis-reinking-manhunt-continues-nashville-police-say/?utm_term=.69579db5fdc6; https://www.tennessean.com/story/news/2018/04/23/waffle-house-shooting-travis-reinking-search-continues-antioch-nashville/541313002/; https://www.nytimes.com/2018/04/23/us/waffle-house-shooting-nashville.html; https://www.buzzfeed.com/briannasacks/this-is-what-we-know-about-the-suspected-waffle-house-gunman?utm_term=.ilj2Knad6#.lklzyb3vj; http://www.wkrn.com/news/manhunt-continues-for-gunman-who-killed-4-at-antioch-waffle-house/1134986998

Army veteran Albert Cheung Wong, 36, stormed a veterans home where he was previously under care, exchanging gunfire with a sheriff’s deputy and taking three women hostage, one of whom he’d previously threatened. After a standoff with law enforcement, he killed the three women and himself.

Wong had served in Afghanistan and had a history of PTSD.

semiautomatic rifle; shotgun

https://www.cnn.com/2018/03/10/us/california-veterans-home-shooting/index.html; http://www.ktvu.com/news/gunman-in-yountville-veterans-home-killings-was-ex-patient; https://www.washingtonpost.com/news/post-nation/wp/2018/03/09/police-respond-to-reports-of-gunfire-and-hostages-taken-at-california-veterans-home/?utm_term=.b9dde7ac5f0f

https://www.cnn.com/2018/03/10/us/california-veterans-home-shooting/index.html; http://www.ktvu.com/news/gunman-in-yountville-veterans-home-killings-was-ex-patient; https://www.washingtonpost.com/news/post-nation/wp/2018/03/09/police-respond-to-reports-of-gunfire-and-hostages-taken-at-california-veterans-home/?utm_term=.b9dde7ac5f0f

Marjory Stoneman Douglas High School shooting

Nikolas J. Cruz, 19, heavily armed with an AR-15, tactical gear, and “countless magazines” of ammo, according to the Broward County Sheriff, attacked the high school as classes were ending for the day, killing at least 17 people and injuring many others. He was apprehended by authorities shortly after fleeing the campus.

Cruz had a long history of behavioral problems and had spent time in mental health clinics.

A Florida pawn shop

https://www.nytimes.com/2018/02/14/us/parkland-school-shooting.html; https://www.nytimes.com/2018/02/15/us/nikolas-cruz-florida-shooting.html; https://www.washingtonpost.com/news/local/wp/2019/01/25/feature/brother-parkland-shooter-nikolas-cruz/?utm_term=.1cc1aa9bb21a

https://www.nytimes.com/2018/02/14/us/parkland-school-shooting.html; https://www.nytimes.com/2018/02/15/us/nikolas-cruz-florida-shooting.html

Timothy O'Brien Smith, 28, wearing body armor and well-stocked with ammo, opened fire at a carwash early in the morning in this rural community, killing four people. A fifth victim, though not shot, suffered minor injuries. One of the deceased victims, 25-year-old Chelsie Cline, had been romantically involved with Smith and had broken off the relationship recently, according to her sister. Smith shot himself in the head and died later that night at the hospital.

semiautomatic rifle and semiautomatic handgun

http://www.wpxi.com/news/top-stories/family-members-small-community-in-shock-after-4-killed-in-shooting/690497960; http://www.wpxi.com/news/top-stories/suspect-in-mass-shooting-at-car-wash-pronounced-dead/691578228

http://www.wpxi.com/news/top-stories/family-members-small-community-in-shock-after-4-killed-in-shooting/690497960; http://www.wpxi.com/news/top-stories/suspect-in-mass-shooting-at-car-wash-pronounced-dead/691578228

Rancho Tehama, California

Kevin Janson Neal, 44, went on an approximately 45-minute shooting spree in the rural community of Rancho Tehama Reserve in Northern California, including shooting up an elementary school, before being killed by law enforcement officers. Neal had also killed his wife at home.

Two illegally modified rifles

https://www.nbcnews.com/news/us-news/california-mass-shooter-killed-wife-buried-her-beneath-floor-n821051; https://www.npr.org/sections/thetwo-way/2017/11/15/564335359/in-harm-s-way-school-staff-saved-students-during-tehama-county-shooting; https://twitter.com/anblanx/status/930862796123729920

https://www.nbcnews.com/news/us-news/california-mass-shooter-killed-wife-buried-her-beneath-floor-n821051; https://www.npr.org/sections/thetwo-way/2017/11/15/564335359/in-harm-s-way-school-staff-saved-students-during-tehama-county-shooting; https://twitter.com/anblanx/status/930862796123729920

Sutherland Springs, Texas

Devin Patrick Kelley, a 26-year-old ex-US Air Force airman, opened fire at the First Baptist Church in Sutherland Springs during Sunday morning services, killing at least 26 people and wounding and injuring 20 others. He left the church and fled in his vehicle after engaging in a gunfight with a local citizen; he soon crashed his vehicle and died from a self-inflicted gunshot wound.

Kelley had a history of domestic violence, including a court martial and conviction stemming from assaulting his wife and child; he also had a history of cruelty to animals and of stalking and harassing ex-girlfriends, including an underage girl. He reportedly briefly escaped from a mental health facility in 2012.

Kelley passed federal criminal background checks; the US Air Force failed to provide information on his criminal history to the FBI

Purchased in April 2016 from an Academy Sports & Outdoors store in San Antonio

Ruger AR-556; Kelley also possessed semiautomatic handguns

https://www.washingtonpost.com/news/morning-mix/wp/2017/11/06/who-is-devin-patrick-kelley-gunman-who-officials-say-killed-churchgoers-in-sutherland-springs/; https://www.washingtonpost.com/news/post-nation/wp/2017/11/06/investigators-hunt-for-motive-in-texas-church-shooting-as-the-grieving-spans-generations/; https://www.washingtonpost.com/news/morning-mix/wp/2017/11/06/an-unlikely-hero-describes-gun-battle-and-95-mph-chase-with-texas-shooting-suspect/; http://www.cnn.com/2017/11/06/us/texas-church-shooting/index.html; https://www.usnews.com/news/top-news/articles/2017-11-06/church-shooter-killed-himself-after-vehicle-chase-sheriff-tells-cbs

http://www.expressnews.com/news/local/article/Suspected-gunman-Devin-Patrick-Kelley-lived-near-12334186.php; http://www.denverpost.com/2017/11/06/texas-shooting-devin-patrick-kelley-colorado-arrest/; https://www.nbcnews.com/storyline/texas-church-shooting/who-devin-kelley-alleged-texas-church-shooter-n817806; https://www.click2houston.com/news/sutherland-springs-church-shooter-escaped-mental-health-facility-months-after-attack-on-wife-child

https://www.washingtonpost.com/news/morning-mix/wp/2017/11/06/who-is-devin-patrick-kelley-gunman-who-officials-say-killed-churchgoers-in-sutherland-springs/; https://www.washingtonpost.com/news/post-nation/wp/2017/11/06/investigators-hunt-for-motive-in-texas-church-shooting-as-the-grieving-spans-generations/; https://www.washingtonpost.com/news/morning-mix/wp/2017/11/06/an-unlikely-hero-describes-gun-battle-and-95-mph-chase-with-texas-shooting-suspect/; http://www.cnn.com/2017/11/06/us/texas-church-shooting/index.html; https://www.usnews.com/news/top-news/articles/2017-11-06/church-shooter-killed-himself-after-vehicle-chase-sheriff-tells-cbs

Scott Allen Ostrem, 47, walked into a Walmart in a suburb north of Denver and fatally shot two men and a woman, then left the store and drove away. After an all-night manhunt, Ostrem, who had financial problems but no serious criminal history, was captured by police after being spotted near his apartment in Denver.

semiautomatic handgun

https://www.nytimes.com/2017/11/01/us/thornton-colorado-walmart-shooting.html; http://www.cnn.com/2017/11/01/us/colorado-walmart-shooting/index.html; http://www.thedenverchannel.com/news/crime/colorado-walmart-shooting-suspect-scott-ostrem-had-run-ins-with-police-financial-troubles; http://www.ibtimes.com/who-scott-ostrem-manhunt-underway-colorado-walmart-shooting-suspect-2609562

https://www.nytimes.com/2017/11/01/us/thornton-colorado-walmart-shooting.html; http://www.cnn.com/2017/11/01/us/colorado-walmart-shooting/index.html; http://www.thedenverchannel.com/news/crime/colorado-walmart-shooting-suspect-scott-ostrem-had-run-ins-with-police-financial-troubles; http://www.ibtimes.com/who-scott-ostrem-manhunt-underway-colorado-walmart-shooting-suspect-2609562

Radee Labeeb Prince, 37, fatally shot three people and wounded two others around 9am at Advance Granite Solutions, a home remodeling business where he worked near Baltimore. Hours later he shot and wounded a sixth person at a car dealership in Wilmington, Delaware. He was apprehended that evening following a manhunt by authorities.

.380-caliber; make unclear

http://www.baltimoresun.com/news/maryland/harford/aegis/ph-ag-edgewood-shooting-20171018-story.html; http://www.cnn.com/2017/10/18/us/maryland-harford-county-shooting/index.html

http://www.baltimoresun.com/news/maryland/harford/aegis/ph-ag-edgewood-shooting-20171018-story.html; http://www.cnn.com/2017/10/18/us/maryland-harford-county-shooting/index.html

Stephen Craig Paddock, 64, fired a barrage of rapid gunfire—using semiautomatic rifles modified with "bump stocks"—at thousands of concertgoers on the Las Vegas Strip late on a Sunday night; Paddock had positioned himself in a corner suite on the 32nd floor of the Mandalay Bay Resort and Casino, where he took aim from windows he'd smashed open. Police responding to the attack found Paddock inside the hotel suite, deceased from a self-inflicted gunshot.

Perpetrator's history unclear. In 1969 Paddock's father was classified by the FBI as a dangerous psychopath with suicidal tendencies; psychopathy can be heritable (see Mother Jones sourcing).

Two gun shops in Nevada

23 firearms, mostly rifles; including scopes, and two modified for "fully automatic" firing; two were mounted on tripods

AR-15-style and AK-47-style rifles and "a large cache of ammunition"; four Daniel Defense DDM4 rifles, three FN-15s and other rifles made by Sig Sauer.

https://www.lvmpd.com/en-us/Documents/1_October_FIT_Report_01-18-2018_Footnoted.pdf; https://www.nytimes.com/2017/10/02/us/stephen-paddock-vegas-shooter.html; https://www.wsj.com/articles/las-vegas-suspect-likely-used-automatic-rifle-in-massacre-1506966716; https://www.usatoday.com/story/news/nation/2017/10/02/las-vegas-shooting/722191001/; https://www.usatoday.com/story/news/nation/2017/10/02/las-vegas-shooting/722191001/; http://www.latimes.com/nation/la-las-vegas-shooting-live-updates-paddock-had-19-rifles-in-room-1506985512-htmlstory.html; https://www.nytimes.com/2017/10/02/us/stephen-paddock-vegas-shooter.html; https://www.usatoday.com/story/news/nation/2017/10/06/here-all-victims-las-vegas-shooting/733236001/; https://www.reviewjournal.com/crime/shootings/last-of-local-hospitals-patients-in-las-vegas-shooting-released/; *Note: casualty count from LVMPD report 1-18-18: "deaths of 58 innocent concert goers and injuring more than
700"

https://www.nytimes.com/2017/10/13/us/stephen-paddock-father-vegas.html; http://www.motherjones.com/crime-justice/2017/10/the-las-vegas-shooter-didnt-just-snap-they-never-do/

https://www.lvmpd.com/en-us/Documents/1_October_FIT_Report_01-18-2018_Footnoted.pdf; https://www.nytimes.com/2017/10/02/us/stephen-paddock-vegas-shooter.html; https://www.wsj.com/articles/las-vegas-suspect-likely-used-automatic-rifle-in-massacre-1506966716; https://www.usatoday.com/story/news/nation/2017/10/02/las-vegas-shooting/722191001/; https://www.usatoday.com/story/news/nation/2017/10/02/las-vegas-shooting/722191001/; http://www.latimes.com/nation/la-las-vegas-shooting-live-updates-paddock-had-19-rifles-in-room-1506985512-htmlstory.html; https://www.nytimes.com/2017/10/02/us/stephen-paddock-vegas-shooter.html; https://www.usatoday.com/story/news/nation/2017/10/06/here-all-victims-las-vegas-shooting/733236001/; https://www.reviewjournal.com/crime/shootings/last-of-local-hospitals-patients-in-las-vegas-shooting-released/; *Note: casualty count from LVMPD report 1-18-18: "deaths of 58 innocent concert goers and injuring more than
700"

San Francisco, California

Jimmy Lam, 38, fatally shot three coworkers and wounded two others inside a UPS facility in San Francisco. Lam killed himself as law enforcement officers responded to the scene.

Lam had a history of domestic, work conflict

Unclear; the firearm was stolen in Utah. A second handgun Lam had (also stolen) was unused in the attack.

MAC-10-style “assault pistol”; 30-round magazine. An additional box of ammunition.

http://www.nbcbayarea.com/news/local/Active-Shooter-San-Francisco-Police-428441423.html; https://apnews.com/2c1690393510447995018b0f9467b44c?utm_campaign=SocialFlow&utm_source=Twitter&utm_medium=AP; http://www.sfchronicle.com/bayarea/article/Police-swarm-UPS-building-in-SF-on-report-of-11219519.php; https://www.pressroom.ups.com/pressroom/ContentDetailsViewer.page?ConceptType=PressReleases&id=1497461182413-836; http://www.foxnews.com/us/2017/06/15/san-francisco-ups-facility-shooting-gunman-identified-as-police-seek-motive.html; http://www.sfgate.com/crime/article/UPS-shooter-in-San-Francisco-used-stolen-gun-with-11243414.php

http://www.ktvu.com/news/ktvu-local-news/261771610-story; https://twitter.com/LauraGarciaCann/status/875072768471117824; http://heavy.com/news/2017/06/jimmy-lam-ups-san-francisco-shooting-suspect/; http://heavy.com/news/2017/06/jimmy-lam-ups-san-francisco-shooting-suspect/

http://www.nbcbayarea.com/news/local/Active-Shooter-San-Francisco-Police-428441423.html; https://apnews.com/2c1690393510447995018b0f9467b44c?utm_campaign=SocialFlow&utm_source=Twitter&utm_medium=AP; http://www.sfchronicle.com/bayarea/article/Police-swarm-UPS-building-in-SF-on-report-of-11219519.php; https://www.pressroom.ups.com/pressroom/ContentDetailsViewer.page?ConceptType=PressReleases&id=1497461182413-836; http://www.foxnews.com/us/2017/06/15/san-francisco-ups-facility-shooting-gunman-identified-as-police-seek-motive.html; http://www.sfgate.com/crime/article/UPS-shooter-in-San-Francisco-used-stolen-gun-with-11243414.php

Tunkhannock, Pennsylvania

Randy Stair, a 24-year-old worker at Weis grocery fatally shot three of his fellow employees. He reportedly fired 59 rounds with a pair of shotguns before turning the gun on himself as another co-worker fled the scene for help and law enforcement responded.

http://www.pressconnects.com/story/news/local/pennsylvania/2017/06/08/dead-murder-suicide-pa-weis/102621742/; https://www.washingtonpost.com/news/morning-mix/wp/2017/06/09/killer-in-supermarket-shooting-posted-chilling-videos-online-lauding-columbine-massacre/?utm_term=.4cf2327eb879; https://www.cbsnews.com/news/weiss-supermarket-shooting-spree-randy-stair-spared-coworker/

http://www.pressconnects.com/story/news/local/pennsylvania/2017/06/08/dead-murder-suicide-pa-weis/102621742/; https://www.washingtonpost.com/news/morning-mix/wp/2017/06/09/killer-in-supermarket-shooting-posted-chilling-videos-online-lauding-columbine-massacre/?utm_term=.4cf2327eb879; https://www.cbsnews.com/news/weiss-supermarket-shooting-spree-randy-stair-spared-coworker/

John Robert Neumann, Jr., 45, a former employee of manufacturer Fiamma Inc. fatally shot five workers at the company, and then killed himself on the scene. He'd been fired from the company in April. The attack took place a week before the one-year anniversary of the Orlando nightclub massacre.

semiautomatic handgun

http://www.postandcourier.com/news/multiple-people-dead-following-shooting-near-orlando-monday-morning/article_918fe64c-49f6-11e7-b071-a3fbdb04ebcc.html; http://www.mcclatchydc.com/news/politics-government/national-politics/article154471839.htmlhttp://edition.cnn.com/2017/06/05/us/orlando-fatalities/; http://www.orlandosentinel.com/news/orlando-workplace-shooting/os-john-robert-neumann-shooting-suspect-20170605-story.html

http://www.postandcourier.com/news/multiple-people-dead-following-shooting-near-orlando-monday-morning/article_918fe64c-49f6-11e7-b071-a3fbdb04ebcc.html; http://www.mcclatchydc.com/news/politics-government/national-politics/article154471839.htmlhttp://edition.cnn.com/2017/06/05/us/orlando-fatalities/; http://www.orlandosentinel.com/news/orlando-workplace-shooting/os-john-robert-neumann-shooting-suspect-20170605-story.html

Thomas Hartless, 43, shot and killed a former girlfriend and another employee of a nursing home, and fatally shot the Kirkersville police chief responding to the scene. Hartless' former girlfriend had recently obtained a court protection order against Hartless. Investigators later found more than 60 firearms in the home of Hartless, who was found dead at the scene of the attack, having turned his gun on himself, according to local authorities.

Hartless had a violent criminal history; his former girlfriend had submitted a letter in court recently stating that he had "a severe mental disorder."

http://abc6onyourside.com/news/local/report-of-shooting-in-kirkersville; http://www.cbsnews.com/news/64-guns-seized-from-home-of-killer-in-ohio-nursing-home-shooting/; https://www.whio.com/news/crime--law/kirkersville-neighbor-warns-shooter-month-before-care-center-attack/OukG4cD38566LEogbq0qDM/

http://abc6onyourside.com/news/local/report-of-shooting-in-kirkersville; http://www.cbsnews.com/news/64-guns-seized-from-home-of-killer-in-ohio-nursing-home-shooting/

Kori Ali Muhammad, 39, opened fire along a street in downtown Fresno, killing three people randomly in an alleged hate crime prior to being apprehended by police. Muhammad, who is black, killed three white victims and later described his attack as being racially motivated; he also reportedly yelled 'Allahu Akbar' at the time he was arrested, but authorities indicated they found no links to Islamist terrorism.

http://www.dailymail.co.uk/news/article-4443722/Gunman-Fresno-shooting-speaks-jail.html; https://www.nytimes.com/2017/04/18/us/fresno-shooting-rampage-kori-ali-muhammad.html?_r=0

http://www.dailymail.co.uk/news/article-4443722/Gunman-Fresno-shooting-speaks-jail.html; https://www.nytimes.com/2017/04/18/us/fresno-shooting-rampage-kori-ali-muhammad.html?_r=0

Esteban Santiago, 26, flew from Alaska to Fort Lauderdale, where he opened fire in the baggage claim area of the airport, killing five and wounding six before police aprehended him. (Numerous other people were reportedly injured while fleeing during the panic.)

Among other signs, Santiago had gone to a FBI office in Anchorage and complained that his mind was being controlled by the CIA.

semiautomatic handgun

Walther 9mm semi-automatic pistol[

Arcan Cetin, 20, killed a teen girl and three women in the cosmetics section of a Macy’s department store at the Cascade Mall. A man was critically wounded in the shooting and taken to Harborview Medical Center in Seattle, where he died. Cetin was apprehended by police a few hours after the shooting while driving a car near his residence.

According to the Cetin's stepfather he had "mental health issues"; court records showed that he suffered from anxiety and depression.

http://www.nytimes.com/2016/09/25/us/mall-shooting-washington-state.html; https://www.seattletimes.com/seattle-news/crime/accused-cascade-mall-shooter-dies-in-snohomish-county-jail/

http://www.nytimes.com/2016/09/25/us/mall-shooting-washington-state.html; https://www.seattletimes.com/seattle-news/crime/accused-cascade-mall-shooter-dies-in-snohomish-county-jail/

Gavin Long, 29, a former Marine who served in Iraq, killed three police offers responding to a 911 call, and wounded three others. He was killed in a shoot-out with other officers responding to the scene. Prior to the attack, Long posted prolifically on social media, where he expressed admiration for the cop killer in Dallas 10 days prior.

Two semiautomatic rifles; one semiautomatic handgun

IWI Tavor SAR 5.56 caliber rifle, Springfield XD 9, 9mm

http://time.com/4411027/baton-rouge-shooter-gavin-long/ ; http://www.nytimes.com/2016/07/18/us/baton-rouge-shooting.html; http://www.kansascity.com/news/local/article90266242.html; http://www.nola.com/crime/index.ssf/2016/07/gavin_long_guns_baton_rouge_po.html; http://www.motherjones.com/politics/2016/07/copycat-mass-shooters-rising-baton-rouge-munich

http://time.com/4411027/baton-rouge-shooter-gavin-long/ ; http://www.nytimes.com/2016/07/18/us/baton-rouge-shooting.html; http://www.kansascity.com/news/local/article90266242.html; http://www.nola.com/crime/index.ssf/2016/07/gavin_long_guns_baton_rouge_po.html; http://www.motherjones.com/politics/2016/07/copycat-mass-shooters-rising-baton-rouge-munich ; https://www.nytimes.com/2017/06/30/us/gavin-long-suicide-note-baton-rouge.html

Micah Xavier Johnson, a 25-year-old Army veteran, targeted police at a peaceful Black Lives Matter protest, killing five officers and injuring nine others as well as two civilians. After a prolonged standoff in a downtown building, law enforcement killed Johnson using a robot-delivered bomb.

online and or gun show

Semiautomatic rifle, semiautomatic handguns

Izhmash-Saiga 5.45mm (AK-style) semiautomatic rifle with large capacity magazines; Glock 9mm handgun, .25-caliber semiautomatic handgun

http://www.nytimes.com/2016/07/11/us/dallas-shooting-micah-johnson-police.html?_r=0; http://www.wsj.com/articles/dallas-shooter-purchased-guns-legally-official-says-1468269720

http://www.nytimes.com/2016/07/11/us/dallas-shooting-micah-johnson-police.html?_r=0; http://www.wsj.com/articles/dallas-shooter-purchased-guns-legally-official-says-1468269720

Omar Mateen, 29, attacked the Pulse nighclub in Orlando in the early morning hours of June 12. He was killed by law enforcement who raided the club after a prolonged standoff.

Shooting center in Port St. Lucie, Florida

Semiautomatic rifle, semiautomatic handgun

Sig Sauer MCX rifle, Glock 17 9mm; high-capacity magazines (30 rounds)

http://www.motherjones.com/politics/2016/06/assault-rifle-used-by-orlando-mass-shooter; http://wrbl.com/2016/06/13/orlando-police-make-statement-on-mass-shooting/; http://www.slate.com/articles/news_and_politics/crime/2016/06/the_ar_15_and_other_assault_rifles_are_bad_high_capacity_magazines_are_worse.html

http://www.motherjones.com/politics/2016/06/assault-rifle-used-by-orlando-mass-shooter; http://wrbl.com/2016/06/13/orlando-police-make-statement-on-mass-shooting/; http://www.slate.com/articles/news_and_politics/crime/2016/06/the_ar_15_and_other_assault_rifles_are_bad_high_capacity_magazines_are_worse.html

Cedric L. Ford, who worked as a painter at a manufacturing company, shot victims from his car and at his workplace before being killed by police at the scene. Shortly before the rampage he had been served with a restraining order.

Semiautomatic rifle, semiautomatic handgun

Zastava Serbia AK-47-style rifle, Glock Model 22 .40-caliber handgun; high-capacity magazines (30 rounds)

http://www.nytimes.com/2016/02/26/us/shooting-at-plant-hesston-kansas.html; https://www.washingtonpost.com/news/morning-mix/wp/2016/02/26/alcoholic-violent-depressed-portrait-of-kansas-shooter-emerges/; https://www.washingtonpost.com/news/post-nation/wp/2016/02/26/kansas-gunman-served-protection-from-abuse-order-shortly-before-shootings-sheriff-says/; http://heavy.com/news/2016/02/cedric-ford-hesston-kansas-shooting-shooter-facebook-video-firing-rifle-gun-field-ak47-ak-47-long-gun-photos-watch-youtube/; http://fox4kc.com/2016/02/26/kansas-woman-charged-with-providing-guns-to-hesston-shooter/

http://www.nytimes.com/2016/02/26/us/shooting-at-plant-hesston-kansas.html; https://www.washingtonpost.com/news/morning-mix/wp/2016/02/26/alcoholic-violent-depressed-portrait-of-kansas-shooter-emerges/; https://www.washingtonpost.com/news/post-nation/wp/2016/02/26/kansas-gunman-served-protection-from-abuse-order-shortly-before-shootings-sheriff-says/; http://heavy.com/news/2016/02/cedric-ford-hesston-kansas-shooting-shooter-facebook-video-firing-rifle-gun-field-ak47-ak-47-long-gun-photos-watch-youtube/; http://fox4kc.com/2016/02/26/kansas-woman-charged-with-providing-guns-to-hesston-shooter/

Kalamazoo County, Michigan

Jason B. Dalton, a driver for Uber, apparently selected his victims randomly as he went on a rampage over several hours in three different locations, including five people he shot in the parking lot of a Cracker Barrel restaurant. He was "arrested without incident" at a downtown Kalamazoo bar about six hours after the rampage began.

Semiautomatic handgun

9 mm handgun (ammo used unclear)

http://www.nytimes.com/2016/02/22/us/kalamazoo-michigan-random-shootings.html; http://www.mlive.com/news/kalamazoo/index.ssf/2016/02/4_things_we_know_about_kalamaz.html; http://www.mlive.com/news/kalamazoo/index.ssf/2016/02/prosecutor_mass_shooting_suspe.html#incart_river_index

http://www.nytimes.com/2016/02/22/us/kalamazoo-michigan-random-shootings.html; http://www.mlive.com/news/kalamazoo/index.ssf/2016/02/4_things_we_know_about_kalamaz.html; http://www.mlive.com/news/kalamazoo/index.ssf/2016/02/prosecutor_mass_shooting_suspe.html#incart_river_index

San Bernardino, California

Syed Rizwan Farook left a Christmas party held at Inland Regional Center, later returning with Tashfeen Malik and the two opened fire, killing 14 and wounding 21, ten critically. The two were later killed by police as they fled in an SUV.

The suspects purchased their handguns in the United States; the assault rifles were purchased by a third party.

Two assault rifles and two semi-automatic pistols were used in the attack. Police found a remote controlled explosive device at the scene of the crime. At the home were 12 pipe bombs, 2,500 rounds for the AR-15 variants, 2,000 rounds for the pistols, and several hundred for a .22 calibre rifle. In the suspects' car were an additional 1,400 rounds for the rifles and 200 for the handguns.

Two semiautomatic AR-15-style rifles—one a DPMS A-15, the other a Smith & Wesson M&P15, both with .223 calibre ammunition. Two 9mm semiautomatic handguns. High capacity magazines.

http://www.motherjones.com/mojo/2015/12/san-bernardino-shooting and http://www.cnbc.com/2015/12/03/san-bernardino-shooting-suspects-rizwan-farook-tashfeen-malik-dead.html and http://www.nytimes.com/2015/12/04/us/san-bernardino-shooting.html and http://www.nytimes.com/2015/12/04/us/weapons-in-san-bernardino-shootings-were-legally-obtained.html?_r=0

http://www.motherjones.com/mojo/2015/12/san-bernardino-shooting and http://www.cnbc.com/2015/12/03/san-bernardino-shooting-suspects-rizwan-farook-tashfeen-malik-dead.html and http://www.nytimes.com/2015/12/04/us/san-bernardino-shooting.html and http://www.nytimes.com/2015/12/04/us/weapons-in-san-bernardino-shootings-were-legally-obtained.html?_r=0

Colorado Springs, Colorado

Robert Lewis Dear, 57, shot and killed a police officer and two citizens when he opened fire at a Planned Parenthood health clinic in Colorado Springs, Colorado. Nine others were wounded. Dear was arrested after an hours-long standoff with police.

The judge in the case has not publicly released Dear's medical and mental health records. As of April 5, 2016, Dear was undergoing a competency evaluation. Dear had a history of disputes with his relatives and neighbors. At a hearing in December 2015, he said, "I am a warrior for the babies."

http://www.nytimes.com/2015/11/28/us/colorado-planned-parenthood-shooting.html and http://www.cnn.com/2015/12/09/us/colorado-planned-parenthood-shooting/ and http://www.npr.org/sections/thetwo-way/2015/11/28/457674369/planned-parenthood-shooting-police-name-suspect-procession-for-fallen-officer and http://www.cbsnews.com/news/robert-lewis-dear-planned-parenthood-first-court-appearance/ and http://www.denverpost.com/news/ci_29729326/judge-wont-release-all-records-accused-planned-parenthood and http://www.csindy.com/IndyBlog/archives/2016/02/17/judge-resists-unsealing-dear-affidavits; http://www.nbcnews.com/news/us-news/who-robert-dear-planned-parenthood-shooting-suspect-seemed-strange-not-n470896; https://www.nytimes.com/2015/12/02/us/robert-dear-planned-parenthood-shooting.html

http://www.nytimes.com/2015/11/28/us/colorado-planned-parenthood-shooting.html and http://www.cnn.com/2015/12/09/us/colorado-planned-parenthood-shooting/ and http://www.npr.org/sections/thetwo-way/2015/11/28/457674369/planned-parenthood-shooting-police-name-suspect-procession-for-fallen-officer and http://www.cbsnews.com/news/robert-lewis-dear-planned-parenthood-first-court-appearance/ and http://www.denverpost.com/news/ci_29729326/judge-wont-release-all-records-accused-planned-parenthood and http://www.csindy.com/IndyBlog/archives/2016/02/17/judge-resists-unsealing-dear-affidavits; http://www.nbcnews.com/news/us-news/who-robert-dear-planned-parenthood-shooting-suspect-seemed-strange-not-n470896

Colorado Springs, Colorado

Noah Harpham, 33, shot three people before dead in Colorado Springs before police killed him in a shootout.

Prior to the rampage, Harpham wrote an "incoherent" blog and rambled "nonsensically" in a YouTube video about mind control techniques and God, according to the Denver Post. He had a history of drug and alcohol abuse.

Two handguns and a rifle

AR-15 rifle, a 9 mm pistol, and a .357 revolver

http://www.motherjones.com/mojo/2015/11/open-carry-mass-shooting-colorado-springs and http://www.denverpost.com/news/ci_29059452/colorado-springs-police-confronted-shot-gunman-minutes and http://www.cbsnews.com/news/shooter-in-colorado-springs-rampage-legally-purchased-guns/

http://www.motherjones.com/mojo/2015/11/open-carry-mass-shooting-colorado-springs and http://www.denverpost.com/news/ci_29059452/colorado-springs-police-confronted-shot-gunman-minutes and http://www.cbsnews.com/news/shooter-in-colorado-springs-rampage-legally-purchased-guns/

26-year-old Chris Harper Mercer opened fire at Umpqua Community College in southwest Oregon. The gunman shot himself to death after being wounded in a shootout with police.

Harper-Mercer's mother said in multiple online postings that he had Asperger's syndrome. Harper-Mercer graduated from the Switzer Learning Center, a school for students with special needs, emotional difficulties, autism and Asperger's syndrome.

From the home he shared with his mother. All were legally obtained by either Harper/Mercer or family members.

Five pistols, one rifle, five magazines of ammunition

9 mm Glock pistol, .40 caliber Smith & Wesson, .40 caliber Taurus pistol, .556 caliber Del-Ton; (ammo details unclear)

http://www.nytimes.com/2015/10/03/us/chris-harper-mercer-umpqua-community-college-shooting.html; http://www.latimes.com/nation/nationnow/la-na-nn-chris-harper-mercer-oregon-shooting-20151002-htmlstory.html; http://www.huffingtonpost.com/entry/ian-mercer-father-guns_56116d7ae4b0af3706e12525; http://wate.com/2015/10/02/what-we-know-about-umpqua-community-college-shooter-2/; http://www.cnn.com/2015/10/02/us/oregon-umpqua-community-college-shooting/

http://www.latimes.com/nation/nationnow/la-na-nn-chris-harper-mercer-oregon-shooting-20151002-htmlstory.html

http://www.nytimes.com/2015/10/03/us/chris-harper-mercer-umpqua-community-college-shooting.html; http://www.latimes.com/nation/nationnow/la-na-nn-chris-harper-mercer-oregon-shooting-20151002-htmlstory.html; http://www.huffingtonpost.com/entry/ian-mercer-father-guns_56116d7ae4b0af3706e12525; http://wate.com/2015/10/02/what-we-know-about-umpqua-community-college-shooter-2/; http://www.cnn.com/2015/10/02/us/oregon-umpqua-community-college-shooting/

Chattanooga, Tennessee

Kuwaiti-born Mohammod Youssuf Abdulazeez, 24, a naturalized US citizen, opened fire at a Naval reserve center, and then drove to a military recruitment office where he shot and killed four Marines and a Navy service member, and wounded a police officer and another military service member. He was then fatally shot in an exchange of gunfire with law enforcement officers responding to the attack.

Abdulazeez "had suffered for years from depression and possibly from bipolar disorder," according to a representative of the family. (NYT, July 20 2015)

Yes ("some of the weapons were purchased legally and some of them may not have been")

On the internet, via Armslist.com

2 assault rifles; semiautomatic handgun

AK-47, AR-15, and 30-round magazines; 9mm handgun

http://www.reuters.com/article/2015/07/16/us-usa-shooting-tennessee-idUSKCN0PQ1WY20150716; http://www.nytimes.com/2015/07/18/us/chattanooga-gunmans-past-scoured-for-extremist-ties.html; http://www.wsj.com/articles/chattanooga-shooting-highlights-online-gun-sales-1437435518http://www.nytimes.com/2015/07/19/us/chattanooga-attacks-claim-a-5th-military-service-members-life.html; http://www.cnn.com/2015/07/17/us/tennessee-naval-reserve-shooting/; https://twitter.com/markfollman/status/622105627473477632; http://www.nytimes.com/2015/07/21/us/chattanooga-gunman-wrote-of-suicide-and-martyrdom-official-says.html

http://www.reuters.com/article/2015/07/16/us-usa-shooting-tennessee-idUSKCN0PQ1WY20150716; http://www.nytimes.com/2015/07/18/us/chattanooga-gunmans-past-scoured-for-extremist-ties.html; http://www.wsj.com/articles/chattanooga-shooting-highlights-online-gun-sales-1437435518http://www.nytimes.com/2015/07/19/us/chattanooga-attacks-claim-a-5th-military-service-members-life.html; http://www.cnn.com/2015/07/17/us/tennessee-naval-reserve-shooting/; https://twitter.com/markfollman/status/622105627473477632; http://www.nytimes.com/2015/07/21/us/chattanooga-gunman-wrote-of-suicide-and-martyrdom-official-says.html

Charleston, South Carolina

Dylann Storm Roof, 21, shot and killed 9 people after opening fire at the Emanuel AME Church in Charleston, South Carolina. According to a roommate, he had allegedly been “planning something like that for six months."

Shooter's Choice gun store in West Columbia, South Carolina

.45-caliber Glock (model 41, with 13-round capacity magazine)

http://www.motherjones.com/politics/2015/06/dylann-roofs-attorney; http://www.newsweek.com/report-nine-shot-charleston-south-carolina-church-shooting-344235; http://www.cnn.com/2015/06/19/us/charleston-church-shooting-suspect/; http://www.motherjones.com/politics/2015/06/9-people-dead-mass-shooting-south-carolina-church; http://www.nbcnews.com/storyline/charleston-church-shooting/fbi-says-dyann-roof-should-not-have-been-sold-gun-n390056

http://www.motherjones.com/politics/2015/06/dylann-roofs-attorney; http://www.newsweek.com/report-nine-shot-charleston-south-carolina-church-shooting-344235; http://www.cnn.com/2015/06/19/us/charleston-church-shooting-suspect/; http://www.motherjones.com/politics/2015/06/9-people-dead-mass-shooting-south-carolina-church; http://www.nbcnews.com/storyline/charleston-church-shooting/fbi-says-dyann-roof-should-not-have-been-sold-gun-n390056

Sergio Valencia del Toro, 27, in what officials say was a random act, shot and killed three people including an 11-year-old girl before turning the gun on himself.

While serving in the Air Force, he went to an emergency walk-in clinic because of concerns over his mood swings, and had either sought or been ordered to behavioral health interventions, according to Fox 6 Now. In a 2014 risk assessment with a psychologist at an outpatient clinic in Appleton, Valencia del Toro recalled thinking previously: "If I'm gonna take myself out, I might as well take other people with me." The police report obtained by Fox 6 says that Valencia del Toro had a history of depression, suicidal and occassionally homicidal thoughts, and alcoholism. He was intoxicated on the day of the shooting.

Details unclear, but after the shooting, police found eight guns in total in Valencia del Toro's home, including handguns, shotguns, and rifles, plus and more than 1,000 rounds of ammunition. He took two weapons and ammunition to the bridge.

http://fox6now.com/2015/06/11/released-menasha-police-issue-final-report-on-trestle-trail-bridge-shooting/ and http://www.postcrescent.com/story/news/local/2015/06/11/police-gunman-prior-suicidal-homicidal-thoughts/71064874/ and http://fox6now.com/2015/05/05/he-was-my-future-husband-fiancee-of-menasha-gunman-says-shes-devastated-for-victims-families/

http://fox6now.com/2015/06/11/released-menasha-police-issue-final-report-on-trestle-trail-bridge-shooting/ and http://www.postcrescent.com/story/news/local/2015/06/11/police-gunman-prior-suicidal-homicidal-thoughts/71064874/ and http://fox6now.com/2015/05/05/he-was-my-future-husband-fiancee-of-menasha-gunman-says-shes-devastated-for-victims-families/

Marysville-Pilchuck High School shooting

Jaylen Fryberg, 15, using a .40-caliber Berretta, shot five
students at Marysville High School, including two of his cousins and three friends, killing all but one. Fryberg arranged to meet them for lunch in the school cafeteria by text. Fryberg was reportedly well-liked at the school and there was not believed to be any ill-will between him and his victims. He committed suicide at the scene.

Fryberg was well-liked and allegedly happy, but was also upset about a girl and had posted emotional social media messages. No definitive signs of mental health problems.

Gun was his father's.

Beretta .40-caliber handgun

http://www.seattletimes.com/seattle-news/fourth-marysville-shooting-victim-dies-as-another-is-laid-to-rest/ http://www.mercurynews.com/crime-courts/ci_26814211/jaylen-fryberg-included-tributes-washington-school-shooting-victims

http://www.seattletimes.com/seattle-news/fourth-marysville-shooting-victim-dies-as-another-is-laid-to-rest/ http://www.mercurynews.com/crime-courts/ci_26814211/jaylen-fryberg-included-tributes-washington-school-shooting-victims

Santa Barbara, California

Elliot Rodger, 22, shot three people to death in the college town of Isla Vista near the University of California, Santa Barbara. He also shot others as he drove around town, and injured others by striking them with is vehicle. He committed suicide by shooting himself in his car as police closed in. Prior to the rampage, Rodger stabbed three people to death at his apartment.

Rodger was never hospitalized due to mental illness, but had a long history of mental health issues dating back to his childhood, and received treatment from multiple counselors leading up to his rampage. According to The Independent, Rodger had considered suicide but had no history of violence. Just before his rampage, he sent a 137-page manifesto to multiple people.

Three semi-automatic handguns and two hunting knives

Two Sig Sauer P226 semiautomatic pistols and Glock 34 pistol, and hundreds of rounds of ammo. A 6- inchand 8-inch “SRK” and “Boar Hunter” hunting knives.

http://www.sbsheriff.us/documents/ISLAVISTAINVESTIGATIVESUMMARY.pdf Also: http://www.cnn.com/2014/05/24/us/santa-barbara-isla-vista-shooting-profile/ and http://www.cnn.com/2014/05/24/justice/california-shooting-deaths/index.html and http://www.independent.com/news/2015/feb/20/elliot-rodger-report-details-long-struggle-mental-/ and http://www.cbsnews.com/videos/how-was-elliot-rodger-able-to-purchase-weapons/ and http://www.dailymail.co.uk/news/article-2638922/Santa-Barbara-rampage-killer-bought-three-handguns-legally-gun-shop.html

http://www.sbsheriff.us/documents/ISLAVISTAINVESTIGATIVESUMMARY.pdf Also: http://www.cnn.com/2014/05/24/us/santa-barbara-isla-vista-shooting-profile/ and http://www.cnn.com/2014/05/24/justice/california-shooting-deaths/index.html and http://www.independent.com/news/2015/feb/20/elliot-rodger-report-details-long-struggle-mental-/ and http://www.cbsnews.com/videos/how-was-elliot-rodger-able-to-purchase-weapons/ and http://www.dailymail.co.uk/news/article-2638922/Santa-Barbara-rampage-killer-bought-three-handguns-legally-gun-shop.html

Army Specialist Ivan Lopez, 34, opened fire at the Fort Hood Army Post in Texas, killing three and wounding at least 12 others before shooting himself in the head after engaging with military police. Lt. Gen. Mark A. Milley told reporters that Lopez "had behavioral health and mental health" issues.

Lopez "had a long history of troubling behavior," according to the Washington Post, including a history of decieving others, problems in his personal life, and financial difficulties. However, officials found that Lopez exhibited no signals that he could be violent. In the year leading up to the attack, he sought treatment for medical and behavioral health ailments.

Local gun store in Killeen, Guns Galore

.45-caliber Smith & Wesson handgun

http://www.cnn.com/2014/04/02/us/fort-hood-shooting/ and https://www.washingtonpost.com/news/checkpoint/wp/2015/01/23/army-details-the-downward-spiral-of-the-fort-hood-shooter-ivan-lopez/ and http://www.thedailybeast.com/articles/2014/04/03/soldier-opens-fire-at-fort-hood.html

http://www.cnn.com/2014/04/02/us/fort-hood-shooting/ and https://www.washingtonpost.com/news/checkpoint/wp/2015/01/23/army-details-the-downward-spiral-of-the-fort-hood-shooter-ivan-lopez/ and http://www.thedailybeast.com/articles/2014/04/03/soldier-opens-fire-at-fort-hood.html

Cherie Lash Rhoades, 44, opened fire at the Cedarville Rancheria Tribal Office and Community Center, killing four and wounding two. After running out of ammunition, Rhoades grabbed a butcher knife and stabbed another person.

Two handguns and a butcher knife

9mm semi-automatic handgun

http://www.sacbee.com/news/local/crime/article2603350.html; http://www.csmonitor.com/USA/2014/0223/Alturas-tribal-shooting-Was-embezzlement-eviction-behind-family-revenge-video; http://www.cbsnews.com/news/4-dead-2-injured-at-american-indian-tribal-office-in-northern-california/; http://nativenewsonline.net/currents/former-tribal-chairperson-custody-mass-murder-cedarville-rancheria-tribal-headquarters/

http://www.sacbee.com/news/local/crime/article2603350.html; http://www.csmonitor.com/USA/2014/0223/Alturas-tribal-shooting-Was-embezzlement-eviction-behind-family-revenge-video; http://www.cbsnews.com/news/4-dead-2-injured-at-american-indian-tribal-office-in-northern-california/; http://nativenewsonline.net/currents/former-tribal-chairperson-custody-mass-murder-cedarville-rancheria-tribal-headquarters/

Aaron Alexis, 34, a military veteran and contractor from Texas, opened fire in the Navy installation, killing 12 people and wounding 8 before being shot dead by police.

Had told Rhode Island police the prior month that he'd "heard voices"; had been undergoing mental health treatment with Veterans Affairs since August 2013.

Sharpshooters Small Arms Range

Sawed-off shotgun, 2 boxes of shells; also a .45-caliber handgun taken from a security guard he shot at the scene.

Remington 870 Express 12-gauge shotgun; Beretta handgun

http://www.nytimes.com/2013/09/18/us/state-law-stopped-gunman-from-buying-rifle-officials-say.html; http://edition.cnn.com/2013/09/17/us/navy-yard-shooting-military-contractors; http://www.fbi.gov/washingtondc/press-releases/2013/law-enforcement-shares-findings-of-the-investigation-into-the-washington-navy-yard-shootings/index.html

http://www.nytimes.com/2013/09/18/us/state-law-stopped-gunman-from-buying-rifle-officials-say.html; http://edition.cnn.com/2013/09/17/us/navy-yard-shooting-military-contractors; http://www.fbi.gov/washingtondc/press-releases/2013/law-enforcement-shares-findings-of-the-investigation-into-the-washington-navy-yard-shootings/index.html

Pedro Vargas, 42, set fire to his apartment, killed six people in the complex, and held another two hostages at gunpoint before a SWAT team stormed the building and fatally shot him.

His mother told authorities her son had been acting strangely and needed a psychiatric evaluation.

Florida Gun Center

9mm semi-automatic handgun

http://www.miamiherald.com/2013/07/27/v-print/3526078/a-look-at-the-victims-in-the-hialeah.html http://www.cbsnews.com/8301-201_162-57595796/pedro-vargas-idd-as-gunman-behind-deadly-rampage-in-hialeah-florida/ http://www.miamiherald.com/2013/07/28/3528362/little-about-pedro-vargas-life.html

http://www.miamiherald.com/2013/07/27/v-print/3526078/a-look-at-the-victims-in-the-hialeah.html http://www.cbsnews.com/8301-201_162-57595796/pedro-vargas-idd-as-gunman-behind-deadly-rampage-in-hialeah-florida/ http://www.miamiherald.com/2013/07/28/3528362/little-about-pedro-vargas-life.html

John Zawahri, 23, armed with a homemade assault rifle and high-capacity magazines, killed his brother and father at home and then headed to Santa Monica College, where he was eventually killed by police.

He was known as a solitary teen who regularly ditched class and had an interest in assault weapons; he had been admitted to UCLA's psychiatric ward for a brief period.

Assembled a rifle out of component parts.

Assault rifle, high capacity magazines, antique handgun

.223-caliber semi-automatic assault rifle, about 40 high capacity magazines, "black powder" handgun (likely antique)

http://www.cbsnews.com/8301-504083_162-57589327-504083/john-zawahri-suspected-gunman-in-deadly-santa-monica-shooting-left-farewell-note-police-say/ http://www.latimes.com/news/local/la-me-0611-santa-monica-shooting-20130611,0,1490078.story

http://www.cbsnews.com/8301-504083_162-57589327-504083/john-zawahri-suspected-gunman-in-deadly-santa-monica-shooting-left-farewell-note-police-say/

Federal Way, Washington

Dennis Clark III, 27, shot and killed his girlfriend in their shared apartment, and then shot two witnesses in the building's parking lot and a third victim in another apartment, before being killed by police.

Semiautomatic handgun, shotgun

.40 caliber semi-automatic handgun, pistol grip shotgun

http://seattletimes.com/html/localnews/2020836119_federalwayshootingxml.html

Herkimer County, New York

Kurt Myers, 64, shot six people in neighboring towns, killing two in a barbershop and two at a car care business, before being killed by officers in a shootout after a nearly 19-hour standoff.

Frank's Guns in Marcy, NY

https://www.nyspnews.com/article_display.cfm?article_id=29584

Adam Lanza, 20, shot his mother dead at their home then drove to Sandy Hook Elementary school. He forced his way inside and opened fire, killing 20 children and six adults before committing suicide.

Lanza had a history of serious mental health problems that were known to his family and others, as detailed in a post-massacre investigation by Connecticut authorities.

Stolen from mother

Two semiautomatic handguns, one rifle (assault), one shotgun (assault)

10mm Glock, 9mm SIG Sauer P226 semiautomatic handguns; .223 Bushmaster XM15-E2S semiautomatic rifle; Izhmash Saiga-12 12-gauge semiautomatic shotgun

http://usnews.nbcnews.com/_news/2012/12/14/15911025-authorities-id-gunman-who-killed-27-in-elementary-school-massacre?lite; http://articles.washingtonpost.com/2012-12-14/local/35846977_1_law-enforcement-lanza-brothers-kid

http://usnews.nbcnews.com/_news/2012/12/14/15911025-authorities-id-gunman-who-killed-27-in-elementary-school-massacre?lite; http://articles.washingtonpost.com/2012-12-14/local/35846977_1_law-enforcement-lanza-brothers-kid

http://usnews.nbcnews.com/_news/2012/12/14/15911025-authorities-id-gunman-who-killed-27-in-elementary-school-massacre?lite; http://articles.washingtonpost.com/2012-12-14/local/35846977_1_law-enforcement-lanza-brothers-kid

Andrew Engeldinger, 36, upon learning he was being fired, went on a shooting rampage, killing the business owner, three fellow employees, and a UPS driver. He then killed himself.

His family worried about his "paranoia and delusions" for at least two years prior, and tried to get him to seek treatment.

One semiautomatic handgun

9mm Glock semiautomatic handgun

http://www.startribune.com/local/171774461.html?refer=y

U.S. Army veteran Wade Michael Page, 40, opened fire in a Sikh gurdwara before he died from a self-inflicted gunshot would during a shootout with police.

His Army friends once broke into his apartment, fearing he'd commit suicide in the '90s. A psychiatric nurse who lived downstairs from Page said it was "obvious" he had a mental illness.

One semiautomatic handgun

9mm Springfield Armory XDM semiautomatic handgun

http://www.jsonline.com/news/milwaukee/friend-of-page-feared-what-he-might-do-426edmg-165668826.html; http://usnews.nbcnews.com/_news/2012/09/10/13785426-officer-arriving-at-sikh-temple-shooting-time-to-use-deadly-force?lite; http://articles.latimes.com/2012/aug/08/nation/la-na-nn-sikh-shooting-guns-20120807; http://www.bbc.co.uk/news/world-us-canada-19183359

http://www.jsonline.com/news/milwaukee/friend-of-page-feared-what-he-might-do-426edmg-165668826.html; http://usnews.nbcnews.com/_news/2012/09/10/13785426-officer-arriving-at-sikh-temple-shooting-time-to-use-deadly-force?lite; http://articles.latimes.com/2012/aug/08/nation/la-na-nn-sikh-shooting-guns-20120807; http://www.bbc.co.uk/news/world-us-canada-19183359

James Holmes, 24, opened fire in a movie theater during the opening night of "The Dark Night Rises" and was later arrested outside.

He saw at least three mental health professionals before dropping out of his university.

Gander Mountain stores in Thornton and Aurora, Colo.; Bass Pro Shop in Denver, Colo.; BulkAmmo.com

Two semiautomatic handguns, one rifle (assault), one shotgun

Two .40-caliber Glock semiautomatic handguns; .223-caliber Smith & Wesson M&P15 semiautomatic rifle; 12-gauge Remington 870 pump-action shotgun

http://www.cbsnews.com/8301-201_162-57497820/james-holmes-saw-three-mental-health-professionals-before-shooting/; http://www.9news.com/news/article/283503/188/Aurora-shooting-prompts-gun-bills-in-big-states-; http://www.nytimes.com/2012/07/21/us/shooting-at-colorado-theater-showing-batman-movie.html; http://www.motherjones.com/politics/2012/07/batman-theater-shooting-updates-dark-knight-rises

http://www.cbsnews.com/8301-201_162-57497820/james-holmes-saw-three-mental-health-professionals-before-shooting/; http://www.9news.com/news/article/283503/188/Aurora-shooting-prompts-gun-bills-in-big-states-; http://www.nytimes.com/2012/07/21/us/shooting-at-colorado-theater-showing-batman-movie.html; http://www.motherjones.com/politics/2012/07/batman-theater-shooting-updates-dark-knight-rises

Ian Stawicki, 40, gunned down four patrons at a cafe, and another person during a carjacking nearby, then shot himself as police closed in. (He died later that day in a Seattle hospital.)

His family said he was mentally ill

Bull's Eye Shooter Supply in Tacoma, Wash.

Two semiautomatic handguns

Two .45-caliber semiautomatic handguns

http://usnews.nbcnews.com/_news/2012/05/30/11959312-six-killed-in-seattle-shootings-including-suspect?lite; http://www.cbsnews.com/8301-201_162-57445177/seattle-shooting-hero-hurled-stools-at-gunman-ian-stawicki-saved-three-lives/?pageNum=2&tag=contentMain;contentBody; http://content.usatoday.com/communities/ondeadline/post/2012/05/seattle-killer-had-concealed-carry-permit-owned-6-guns/1#.UFI9shhgspQ

http://usnews.nbcnews.com/_news/2012/05/30/11959312-six-killed-in-seattle-shootings-including-suspect?lite; http://www.cbsnews.com/8301-201_162-57445177/seattle-shooting-hero-hurled-stools-at-gunman-ian-stawicki-saved-three-lives/?pageNum=2&tag=contentMain;contentBody; http://content.usatoday.com/communities/ondeadline/post/2012/05/seattle-killer-had-concealed-carry-permit-owned-6-guns/1#.UFI9shhgspQ

One L. Goh, 43, a former student, opened fire in a nursing classroom. He fled the scene by car and was arrested nearby a few hours later.

A former instructor at Oikos described him as "mentally unstable" and "paranoid."

Bullseye in Castro Valley, Calif.

One semiautomatic handgun

.45-caliber semiautomatic handgun

http://blog.sfgate.com/eguillermo/2012/04/05/something-still-doesnt-compute-in-the-one-goh-nightmare/; http://www.mercurynews.com/top-stories/ci_20308252/police-respond-shooting-east-oakland; http://www.cbsnews.com/8301-504083_162-57408732-504083/gun-used-in-oikos-university-shooting-rampage-was-bought-legally-police-say/; http://berkeley.patch.com/articles/one-l-goh-showed-violent-tendencies-before-the-oikos-university-shooting-oikos-university-shooting

http://berkeley.patch.com/articles/one-l-goh-showed-violent-tendencies-before-the-oikos-university-shooting-oikos-university-shooting; http://blog.sfgate.com/eguillermo/2012/04/05/something-still-doesnt-compute-in-the-one-goh-nightmare/

http://blog.sfgate.com/eguillermo/2012/04/05/something-still-doesnt-compute-in-the-one-goh-nightmare/; http://www.mercurynews.com/top-stories/ci_20308252/police-respond-shooting-east-oakland; http://www.cbsnews.com/8301-504083_162-57408732-504083/gun-used-in-oikos-university-shooting-rampage-was-bought-legally-police-say/; http://berkeley.patch.com/articles/one-l-goh-showed-violent-tendencies-before-the-oikos-university-shooting-oikos-university-shooting

Jeong Soo Paek, 59, returned to a Korean spa from which he'd been kicked out after an altercation. He gunned down two of his sisters and their husbands before committing suicide.

His sister worried about his homicidal tendencies; she said his mental health had been deteriorating and that he had threatened to commit suicide with his gun.

One semiautomatic handgun

.45-caliber semiautomatic handgun

http://www.gwinnettdailypost.com/news/2012/feb/23/police-id-4-victims-shooter-in-spa-killing/; http://www.cbsnews.com/8301-504083_162-57479989-504083/shooting-sprees-in-2012-crimesider-reports-on-some-of-the-countrys-worst-public-shootings-this-year/; http://chronicle.augusta.com/news/metro/2012-02-22/victims-korean-spa-shooting-near-atlanta-were-2-married-couples-gunman-was; http://onlineathens.com/local-news/2012-02-23/mass-shooting-spa-shocks-ga-korean-community

http://www.gwinnettdailypost.com/news/2012/feb/23/police-id-4-victims-shooter-in-spa-killing/; http://www.cbsnews.com/8301-504083_162-57479989-504083/shooting-sprees-in-2012-crimesider-reports-on-some-of-the-countrys-worst-public-shootings-this-year/; http://chronicle.augusta.com/news/metro/2012-02-22/victims-korean-spa-shooting-near-atlanta-were-2-married-couples-gunman-was; http://onlineathens.com/local-news/2012-02-23/mass-shooting-spa-shocks-ga-korean-community

Scott Evans Dekraai, 42, opened fire inside a hair salon and was later arrested. Victims killed in the attack included his ex-wife, who Dekraai had a history of violently abusing, according to court records. The two had also been involved in a bitter custody battle.

He suffered from bipolar disorder, mood swings, and PTSD. After an assault on his elderly stepfather, he was sentenced in 2008 to a year of anger management therapy.

Two semiautomatic handguns, one revolver

.45-caliber Heckler & Koch, 9mm Springfield semiautomatic handguns; .44 Magnum Smith & Wesson revolver

http://laist.com/2011/10/13/seal_beach_shooter_suffered_from_ptsd.php; http://blogs.ocweekly.com/navelgazing/2011/10/hair_salon_seal_beach_shooting.php; http://latimesblogs.latimes.com/lanow/2011/10/seal-beach-shooting-suspect-had-been-ordered-not-to-carry-guns-.html; http://articles.latimes.com/2011/oct/12/local/la-me-1013-seal-beach-shooting-20111013

http://laist.com/2011/10/13/seal_beach_shooter_suffered_from_ptsd.php; http://blogs.ocweekly.com/navelgazing/2011/10/hair_salon_seal_beach_shooting.php; http://latimesblogs.latimes.com/lanow/2011/10/seal-beach-shooting-suspect-had-been-ordered-not-to-carry-guns-.html; http://articles.latimes.com/2011/oct/12/local/la-me-1013-seal-beach-shooting-20111013; https://www.nydailynews.com/news/national/seal-beach-shooting-scott-evans-dekraai-arrested-deadly-hair-salon-rampage-left-8-dead-article-1.962942

Eduardo Sencion, 32, opened fire at an International House of Pancakes restaurant and later died from a self-inflicted gunshot wound.

He was diagnosed with paranoid schizophrenia as a teenager and feared demons were out to get him.

Purchased from an individual

Two rifles (both assault), one revolver

AK-47 Norinco Arms variant, AK-47 Romarm Cugir variant rifles; .38-caliber Colt revolver

http://www.huffingtonpost.com/2011/11/03/eduardo-sencion-ihop-shooter_n_1073677.html; http://www.lasvegassun.com/news/2011/sep/06/report-seven-shot-inside-carson-city-ihop/; http://www.lasvegassun.com/news/2011/oct/23/nv-gun-laws-rampage-2nd-ld-writethru/

http://www.huffingtonpost.com/2011/11/03/eduardo-sencion-ihop-shooter_n_1073677.html; http://www.lasvegassun.com/news/2011/sep/06/report-seven-shot-inside-carson-city-ihop/; http://www.lasvegassun.com/news/2011/oct/23/nv-gun-laws-rampage-2nd-ld-writethru/

Jared Loughner, 22, opened fire outside a Safeway during a constituent meeting with Congresswoman Gabrielle Giffords (D-Ariz.) before he was subdued by bystanders and arrested.

His symptoms pointed to various possible mental illness diagnoses, such as schizophrenia and delusional disorder. He also experimented with pot and hallucinogens.

Sportsmen's Warehouse in Tucson, Ariz.

One semiautomatic handgun

9mm Glock 19 semiautomatic handgun

http://www.time.com/time/magazine/article/0,9171,2042358,00.html; http://www.csmonitor.com/USA/Politics/2011/0110/Why-Jared-Loughner-was-allowed-to-buy-a-gun; http://www.nytimes.com/2011/01/09/us/politics/09giffords.html?ref=jaredleeloughner

http://www.time.com/time/magazine/article/0,9171,2042358,00.html; http://www.csmonitor.com/USA/Politics/2011/0110/Why-Jared-Loughner-was-allowed-to-buy-a-gun; http://www.nytimes.com/2011/01/09/us/politics/09giffords.html?ref=jaredleeloughner

Manchester, Connecticut

Omar S. Thornton, 34, shot up his Hartford Beer Distributor workplace after facing disciplinary issues, then committed suicide.

He apparently was driven over the edge by unaddressed, ongoing racism against him at work

Gun dealer in East Windsor, Conn.

Two semiautomatic handguns

Two 9mm Ruger SR9 semiautomatic handguns

http://www.cbsnews.com/8301-504083_162-20012557-504083.html; http://www.msnbc.msn.com/id/38535909/ns/us_news-crime_and_courts/t/dead-shooting-conn-beer-distributor/#.UFGJAqRrND4; http://www.foxnews.com/us/2010/08/03/dead-wounded-conn-workplace-shooting/

http://www.cbsnews.com/8301-504083_162-20012557-504083.html; http://www.msnbc.msn.com/id/38535909/ns/us_news-crime_and_courts/t/dead-shooting-conn-beer-distributor/#.UFGJAqRrND4; http://www.foxnews.com/us/2010/08/03/dead-wounded-conn-workplace-shooting/

Maurice Clemmons, 37, a felon who was out on bail for child-rape charges, entered a coffee shop on a Sunday morning and shot four police officers who had gone there to use their laptops before their shifts. Clemmons, who was wounded fleeing the scene, was later shot dead by a police officer in Seattle after a two-day manhunt.

He had a history of erratic, bizarre behavior. He once asked his family to get naked for 5 minutes on Sunday; he said he thought the world would end and that he was Jesus.

Stolen from an individual in Seattle.

One semiautomatic handgun

9mm Glock 17 semiautomatic handgun; .38-caliber Smith & Wesson revolver

http://seattletimes.com/html/localnews/2010385617_webmansought29.html; http://www.nytimes.com/2009/11/30/us/30tacoma.html?_r=1; http://seattletimes.com/html/localnews/2014155225_clemmons08m.html

http://seattletimes.com/html/localnews/2010385617_webmansought29.html; http://www.nytimes.com/2009/11/30/us/30tacoma.html?_r=1; http://seattletimes.com/html/localnews/2014155225_clemmons08m.html

Army psychiatrist Nidal Malik Hasan, 39, opened fire on an Army base in an attack linked to Islamist extremism. Hasan was injured during the attack and later arrested.

Medical officials at Walter Reed Army Medical Center and the Uniformed Services University of the Health Sciences raised concerns prior to the shooting regarding Hasan's aloof and erratic behavior and extremist Islamic views.

Guns Galore in Kileen, Texas

One semiautomatic handgun

FN Five-seven semiautomatic handgun

http://seattletimes.com/html/nationworld/2010232219_apusforthoodshooting.html; http://articles.latimes.com/2010/oct/21/nation/la-na-fort-hood-20101022; http://thelede.blogs.nytimes.com/2009/11/05/reports-of-mass-shooting-at-fort-hood/; http://www.usatoday.com/news/military/story/2012-08-14/fort-hood-rampage-trial/57050394/1

http://seattletimes.com/html/nationworld/2010232219_apusforthoodshooting.html; http://articles.latimes.com/2010/oct/21/nation/la-na-fort-hood-20101022; http://thelede.blogs.nytimes.com/2009/11/05/reports-of-mass-shooting-at-fort-hood/; http://www.usatoday.com/news/military/story/2012-08-14/fort-hood-rampage-trial/57050394/1

Jiverly Wong, 41, opened fire at an American Civic Association center for immigrants before committing suicide.

He apparently harbored growing paranoia toward cops. He also sent a delusional letter to a local TV station right before the shooting.

Gander Mountain in Johnson City, N.Y.

Two semiautomatic handguns

9mm Beretta, .45-caliber Springfield semiautomatic handguns

http://www.nytimes.com/2009/04/12/nyregion/12binghamton.html?pagewanted=all&_r=0; http://www.nytimes.com/2009/04/04/nyregion/04hostage.html?pagewanted=all

http://www.nytimes.com/2009/04/12/nyregion/12binghamton.html?pagewanted=all&_r=0; http://www.nytimes.com/2009/04/04/nyregion/04hostage.html?pagewanted=all

Robert Stewart, 45, opened fire at a nursing home where his estranged wife worked before he was shot and arrested by a police officer.

His estranged wife told her workplace that her husband had an "unstable mental state or (was) mentally ill."

Local sporting goods stores and individuals

One revolver, one shotgun

Winchester 1300 pump-action shotgun; .357 Magnum revolver

http://www.wral.com/news/local/story/9845639/; http://www.wral.com/news/local/story/4837676/

http://www.wral.com/news/local/story/9845639/; http://www.wral.com/news/local/story/4837676/

Disgruntled employee Wesley Neal Higdon, 25, shot up an Atlantis Plastics factory after he was escorted out of his workplace for an argument with a supervisor. Higdon shot the supervisor outside the factory before opening fire on coworkers inside. He then committed suicide.

He called his girlfriend two hours before the shooting to say he was going to kill his boss.

One semiautomatic handgun

.45-caliber Hi-Point semiautomatic handgun

http://www.foxnews.com/story/0,2933,371242,00.html; http://www.msnbc.msn.com/id/25393695/ns/us_news-crime_and_courts/t/witnesses-describe-chaotic-scene-ky-plant/#.UFEbHhhgspQ

http://www.foxnews.com/story/0,2933,371242,00.html; http://www.msnbc.msn.com/id/25393695/ns/us_news-crime_and_courts/t/witnesses-describe-chaotic-scene-ky-plant/#.UFEbHhhgspQ

Steven Kazmierczak, 27, opened fire in a lecture hall, then shot and killed himself before police arrived.

He had a long history of mental health struggles; after high school, his parents placed him at a psychiatric treatment center. He told friends he left the Army after six months due to a psychological discharge.

Online and gun retailers in Champaign, Ill.

Three semiautomatic handguns, one shotgun

9mm Glock 19, Hi-Point CF380, 9mm Kurz SIG Sauer P232 semiautomatic handguns; 12-gauge Remington Sportsman 48 sawed-off shotgun

http://www.huffingtonpost.com/jonathan-fast/steve-kazmierczak-the-sec_b_87031.html; http://www.msnbc.msn.com/id/23171567/ns/us_news-crime_and_courts/t/college-shooters-deadly-rampage-baffles-friends/#.UFEZnhhgspQ; http://www.nytimes.com/slideshow/2008/02/14/us/0214-SHOOTING_index.html?ref=schoolshooting&gwh=B62598A5487B946A532C5846B4A85156; www.niu.edu/feb14report/Feb14report.pdf

http://www.cbsnews.com/stories/2008/02/16/national/main3840072.shtml; http://www.esquire.com/news-politics/a4863/steven-kazmierczak-0808/

http://www.huffingtonpost.com/jonathan-fast/steve-kazmierczak-the-sec_b_87031.html; http://www.msnbc.msn.com/id/23171567/ns/us_news-crime_and_courts/t/college-shooters-deadly-rampage-baffles-friends/#.UFEZnhhgspQ; http://www.nytimes.com/slideshow/2008/02/14/us/0214-SHOOTING_index.html?ref=schoolshooting&gwh=B62598A5487B946A532C5846B4A85156; www.niu.edu/feb14report/Feb14report.pdf

Charles "Cookie" Lee Thornton, 52, went on a rampage at the city hall before being shot and killed by police.

He was known for histrionics and disruptions at city council meetings. His mounting debt was a stressor.

Taken in burglary and from fallen police officer

One semiautomatic handgun, one revolver

.40-caliber Smith & Wesson semiautomatic handgun; .44 Magnum Smith & Wesson Model 29 revolver

http://www.stltoday.com/news/local/crime-and-courts/charles-lee-cookie-thornton-behind-the-smile/article_be96f13c-78b9-11df-bfdc-0017a4a78c22.html; http://www.nytimes.com/2008/02/08/us/08missouri.html; http://nl.newsbank.com/nl-search/we/Archives?p_product=SL&p_theme=sl&p_action=search&p_maxdocs=200&p_topdoc=1&p_text_direct-0=11F1CADA291472F0&p_field_direct-0=document_id&p_perpage=10&p_sort=YMD_date:D&s_trackval=GooglePM

http://www.stltoday.com/news/local/crime-and-courts/charles-lee-cookie-thornton-behind-the-smile/article_be96f13c-78b9-11df-bfdc-0017a4a78c22.html; http://www.nytimes.com/2008/02/08/us/08missouri.html; http://nl.newsbank.com/nl-search/we/Archives?p_product=SL&p_theme=sl&p_action=search&p_maxdocs=200&p_topdoc=1&p_text_direct-0=11F1CADA291472F0&p_field_direct-0=document_id&p_perpage=10&p_sort=YMD_date:D&s_trackval=GooglePM

Robert A. Hawkins, 19, opened fire inside Westroads Mall before committing suicide.

He had been treated in the past for depression and ADHD.

Stolen from grandfather

WASR-10 Century Arms semiautomatic rifle

http://www.guardian.co.uk/world/2007/dec/06/usa.usgunviolence2; http://www.npr.org/templates/story/story.php?storyId=16962485; http://www.independentmail.com/news/2007/dec/08/officials-say-assault-rifles-cause-roughly-same-am/; http://www.latimes.com/news/nationworld/nation/la-na-mall7dec07,0,882178.story

http://www.guardian.co.uk/world/2007/dec/06/usa.usgunviolence2; http://www.npr.org/templates/story/story.php?storyId=16962485; http://www.independentmail.com/news/2007/dec/08/officials-say-assault-rifles-cause-roughly-same-am/; http://www.latimes.com/news/nationworld/nation/la-na-mall7dec07,0,882178.story

Off-duty sheriff's deputy Tyler Peterson, 20, opened fire inside an apartment after an argument at a homecoming party. He fled the scene and later committed suicide.

The families of victims filed a wrongful death lawsuit against the county arguing that the police department should have evaluated the gunman's mental health before hiring him.

Issued by Forest County Sheriff's Department

AR-15 SWAT semiautomatic rifle

http://www.rivernewsonline.com/main.asp?SectionID=6&SubSectionID=47&ArticleID=368; http://news.google.com/newspapers?id=O-MqAAAAIBAJ&sjid=u0UEAAAAIBAJ&pg=6724,5434155&dq=crandon+shooting&hl=en

http://www.rivernewsonline.com/main.asp?SectionID=6&SubSectionID=47&ArticleID=368; http://news.google.com/newspapers?id=O-MqAAAAIBAJ&sjid=u0UEAAAAIBAJ&pg=6724,5434155&dq=crandon+shooting&hl=en

Virginia Tech student Seung-Hui Cho, 23, opened fire on his school's campus before committing suicide.

A district court ruled Cho was "an imminent danger" to himself and others as a result of mental illness two years earlier, and directed Cho to seek treatment.

Purchased variously online and from Roanoke Firearms in Roanoke, Va.

Two semiautomatic handguns

9mm Glock 19, .22-caliber Walther P22 semiautomatic handguns

http://www.nytimes.com/2007/04/24/us/24virginia.html; http://www.thestandard.com.hk/news_detail.asp?we_cat=9&art_id=42489&sid=13196711&con_type=1&d_str=20070419&fc=10; http://smartgunlaws.org/mental-health-reporting-policy-summary/

http://www.nytimes.com/2007/04/24/us/24virginia.html; http://www.thestandard.com.hk/news_detail.asp?we_cat=9&art_id=42489&sid=13196711&con_type=1&d_str=20070419&fc=10; http://smartgunlaws.org/mental-health-reporting-policy-summary/

Sulejman Talović‡, 18, rampaged through the shopping center until he was shot dead by police.

According to one relative, he was violent and had the mental capacity of a child. (But accounts from others did not indicate this about the shooter.)

Purchased variously from Sportsman's Fast Cash in West Valley City, Utah and individuals

One revolver, one shotgun

Mossberg Maverick 88 Field shotgun; .38-caliber Smith & Wesson M36 revolver

http://www.deseretnews.com/article/660205647/Ex-relative-calls-Talovic-vicious-troubled.html?pg=all; http://www.cbsnews.com/stories/2007/02/15/national/main2480419.shtml; http://www.cbsnews.com/8301-201_162-2823327.html

http://www.deseretnews.com/article/660205647/Ex-relative-calls-Talovic-vicious-troubled.html?pg=all; http://www.cbsnews.com/stories/2007/02/15/national/main2480419.shtml; http://www.cbsnews.com/8301-201_162-2823327.html

Lancaster County, Pennsylvania

Charles Carl Roberts, 32, shot 10 young girls in a one-room schoolhouse in Bart Township, killing 5, before taking his own life.

He told his wife that he'd molested two young relatives 20 years ago.

Local stores in Nickel Mines, Penn.

One semiautomatic handgun, one rifle, one shotgun

Springfield semiautomatic handgun; .30-06 Ruger bolt-action rifle; 12-gauge Browning pump-action shotgun

http://news.google.com/newspapers?id=O8oyAAAAIBAJ&sjid=YSUEAAAAIBAJ&pg=6143,1260138&dq=charles+carl+roberts+mentally+ill&hl=en;http://www.msnbc.msn.com/id/15105305/ns/us_news-crime_and_courts/t/th-girl-dies-after-amish-schoolhouse-shooting/#.UFD4SxhgspQ; http://www.foxnews.com/story/0,2933,217170,00.html

http://news.google.com/newspapers?id=O8oyAAAAIBAJ&sjid=YSUEAAAAIBAJ&pg=6143,1260138&dq=charles+carl+roberts+mentally+ill&hl=en;http://www.msnbc.msn.com/id/15105305/ns/us_news-crime_and_courts/t/th-girl-dies-after-amish-schoolhouse-shooting/#.UFD4SxhgspQ; http://www.foxnews.com/story/0,2933,217170,00.html

Kyle Aaron Huff, 28, opened fire at a rave afterparty in the Capitol Hill neighborhood of Seattle before committing suicide.

Police were unable to find any record that he had been treated for mental illness or was on psychiatric medication.

Various sporting goods stores in Kalispell, Mont.

Two semiautomatic handguns, one rifle (assault), one shotgun

.40-caliber Ruger, one other semiautomatic handgun; Bushmaster XM15 E2S semiautomatic rifle; 12-gauge Winchester Defender pump-action shotgun with extended tube and pistol grip

http://seattletimes.com/html/localnews/2002892043_shooter27m.html; http://seattletimes.com/html/localnews/2002898900_huff30m.html

http://seattletimes.com/html/localnews/2002892043_shooter27m.html; http://seattletimes.com/html/localnews/2002898900_huff30m.html

Former postal worker Jennifer Sanmarco, 44, shot dead a former neighbor then drove to the mail processing plant where she used to work. Inside, she opened fire, killing six employees before committing suicide.

She was placed on retirement disability for psychological reasons. Fellow employees described her behavior as increasingly bizarre. She believed the Postal Service employees were conspiring against her.

Pawn shops in Grants and Gallup, N.M.

One semiautomatic handgun

9mm Smith & Wesson 915 semiautomatic handgun

http://www.msnbc.msn.com/id/11167920/ns/us_news-crime_and_courts/t/postal-killer-believed-she-was-target-plot/#.UIxy7kzLwTE; http://www.cbsnews.com/stories/2006/02/02/national/main1272077.shtml;

http://www.msnbc.msn.com/id/11167920/ns/us_news-crime_and_courts/t/postal-killer-believed-she-was-target-plot/#.UIxy7kzLwTE; http://www.cbsnews.com/stories/2006/02/02/national/main1272077.shtml;

Jeffrey Weise, 16, murdered his grandfather, who was a police officer, and grandfather's girlfriend. Weise then drove his grandfather's squad car to Red Lake Senior High School and opened fire on the reservation campus, killing another seven people before committing suicide.

He voluntarily visited a a psychiatric ward. He was hospitalized at least once for suicidal tendencies and was taking Prozac.

Glock and Remington stolen from grandfather

Two semiautomatic handguns, one shotgun

.40-caliber Glock 23, .22-caliber Ruger semiautomatic handguns; 12-gauge Remington 870 shotgun

http://news.google.com/newspapers?id=c4dIAAAAIBAJ&sjid=_XEDAAAAIBAJ&pg=5163,1527281&dq=jeffrey+weise+mental+ill&hl=en; http://www.cbsnews.com/stories/2005/03/24/national/main682915.shtml?source=search_story; http://www.usnews.com/usnews/news/articles/050404/4redlake.htm; http://www.foxnews.com/story/0,2933,151116,00.html

http://news.google.com/newspapers?id=c4dIAAAAIBAJ&sjid=_XEDAAAAIBAJ&pg=5163,1527281&dq=jeffrey+weise+mental+ill&hl=en; http://www.cbsnews.com/stories/2005/03/24/national/main682915.shtml?source=search_story; http://www.usnews.com/usnews/news/articles/050404/4redlake.htm; http://www.foxnews.com/story/0,2933,151116,00.html

Living Church of God member Terry Michael Ratzmann, 44, opened fire at a church meeting at a Sheraton hotel before committing suicide.

Neighbors said he suffered from depression and had a drinking problem.

Gun dealer in Waukesha, Wis.

One semiautomatic handgun

9mm Beretta semiautomatic handgun

http://www.cbsnews.com/2100-201_162-679761.html; http://www.foxnews.com/story/0,2933,150255,00.html; http://www.msnbc.msn.com/id/7167861/ns/us_news-crime_and_courts/t/relatives-struggle-answers-after-shooting/#.UN3Scko6JT4

http://www.cbsnews.com/2100-201_162-679761.html; http://www.foxnews.com/story/0,2933,150255,00.html; http://www.msnbc.msn.com/id/7167861/ns/us_news-crime_and_courts/t/relatives-struggle-answers-after-shooting/#.UN3Scko6JT4

Nathan Gale, 25, possibly upset about the breakup of Pantera, gunned down former Pantera guitarist Dimebag Darrell and three others at a Damageplan show before a police officer fatally shot Gale.

He was discharged from the military because he was a paranoid schizophrenic.

Received as a gift from mother

One semiautomatic handgun

9mm Beretta 92FS semiautomatic handgun

http://www.cbsnews.com/2100-201_162-659983.html; http://www.knac.com/article.asp?ArticleID=3417; http://www.blabbermouth.net/news.aspx?mode=Article&newsitemID=86362

http://www.cbsnews.com/2100-201_162-659983.html; http://www.knac.com/article.asp?ArticleID=3417; http://www.blabbermouth.net/news.aspx?mode=Article&newsitemID=86362

Assembly line worker Douglas Williams, 48, opened fire at his Lockheed Martin workplace in a racially motivated attack before committing suicide.

His cousin said he was depressed and "going through a lot of things."

Purchased from an individual

One semiautomatic handgun, two rifles, one derringer, one shotgun

.45-caliber Ruger P90 semiautomatic handgun; .22-caliber rifle with scope, .223-caliber Ruger Mini-14 rifle; 12-gauge Winchester 1300 shotgun; .22 Magnum derringer

http://usatoday30.usatoday.com/news/nation/2003-07-08-miss-shooting-main_x.htm; http://www.nytimes.com/2003/07/09/us/man-kills-5-co-workers-at-plant-and-himself.html; http://www.nytimes.com/2003/07/16/us/national-briefing-south-mississippi-death-toll-rises-in-plant-shooting.html

http://usatoday30.usatoday.com/news/nation/2003-07-08-miss-shooting-main_x.htm; http://www.nytimes.com/2003/07/09/us/man-kills-5-co-workers-at-plant-and-himself.html; http://www.nytimes.com/2003/07/16/us/national-briefing-south-mississippi-death-toll-rises-in-plant-shooting.html

Fired employee William D. Baker, 66, opened fire at his former Navistar workplace before committing suicide.

He had a criminal past, including a sexual assault conviction.

Some purchased from Pepper Sports in Glen Ellyn, Ill.

Two rifles, one revolver, one shotgun

SKS 1954R, .30-caliber Winchester rifles; 12-gauge Remington pump-action shotgun; .38-caliber revolver

http://articles.chicagotribune.com/2001-02-07/news/0102070122_1_navistar-gun-law-hunting-rifle; http://www.vpc.org/studies/wgun010205.htm

http://articles.chicagotribune.com/2001-02-07/news/0102070122_1_navistar-gun-law-hunting-rifle; http://www.vpc.org/studies/wgun010205.htm

Wakefield, Massachusetts

Michael McDermott, 42, opened fire on co-workers at Edgewater Technology and was later arrested.

Psychiatrist guessed he had schizophrenia, but McDermott had researched how to fake a mental illness on the internet. Defense lawyer described history of suicide attempts and mental illness dating back to teen years. Jury rejected his insanity defense.

One semiautomatic handgun, one rifle (assault), one shotgun

.32-caliber Retolaza semiautomatic handgun; AK-47 variant semiautomatic rifle; 12-gauge Winchester 1300 pump-action shotgun

http://www.time.com/time/magazine/article/0,9171,93313,00.html; http://articles.cnn.com/2002-04-22/justice/ctv.mcdermott.trial_1_michael-mcdermott-jury-deliberates-fate-mental-illness?_s=PM:LAW; http://www.nytimes.com/2000/12/27/us/7-die-in-rampage-at-company-co-worker-of-victims-arrested.html; http://www.vpc.org/studies/wgun001226.htm

http://articles.cnn.com/2002-04-22/justice/ctv.mcdermott.trial_1_michael-mcdermott-jury-deliberates-fate-mental-illness?_s=PM:LAW; http://www.boston.com/news/daily/24/mcdermott_verdict.htm

http://www.time.com/time/magazine/article/0,9171,93313,00.html; http://articles.cnn.com/2002-04-22/justice/ctv.mcdermott.trial_1_michael-mcdermott-jury-deliberates-fate-mental-illness?_s=PM:LAW; http://www.nytimes.com/2000/12/27/us/7-die-in-rampage-at-company-co-worker-of-victims-arrested.html; http://www.vpc.org/studies/wgun001226.htm

Hotel employee Silvio Leyva, 36, gunned down four coworkers at the Radisson Bay Harbor Inn before killing a woman outside who refused to give him her car. He was arrested shortly after the shootings.

His brother called him "unbalanced" and mentally ill.

One purchased from Big E's in Tampa, Fla.

One semiautomatic handgun, one revolver

9mm Lorcin semiautomatic handgun; .38-caliber Charter Arms revolver

http://www.sptimes.com/News/123000/news_pf/TampaBay/A_year_later__the_str.shtml; http://www.vpc.org/studies/wgun991230.htm; http://news.google.com/newspapers?id=CSUdAAAAIBAJ&sjid=ZaYEAAAAIBAJ&pg=2043,2634069&dq=silvio+leyva+shooting&hl=en

http://www.sptimes.com/News/123000/news_pf/TampaBay/A_year_later__the_str.shtml; http://www.vpc.org/studies/wgun991230.htm; http://news.google.com/newspapers?id=CSUdAAAAIBAJ&sjid=ZaYEAAAAIBAJ&pg=2043,2634069&dq=silvio+leyva+shooting&hl=en

Byran Koji Uyesugi, 40, a Xerox service technician, opened fire inside the building with a 9mm Glock. He fled and was later apprehended by police.

A psychiatrist, testifying for the prosecution,said he suffered from schizophrenia.

Hunting Supplies of Hawaii (The Armory) in Honolulu, Hawaii

One semiautomatic handgun

9mm Glock 17 semiautomatic handgun

http://archives.starbulletin.com/2000/06/02/news/story2.html; http://www.vpc.org/studies/wgun991102.htm

http://archives.starbulletin.com/2000/06/02/news/story2.html; http://www.vpc.org/studies/wgun991102.htm

Larry Gene Ashbrook, 47, opened fire inside the Wedgwood Baptist Church during a prayer rally before committing suicide.

His siblings decribed him as a paranoid schizophrenic.

Trader's Village flea market in Grand Prairie, Texas

Two semiautomatic handguns

.380-caliber, 9mm Ruger P85 semiautomatic handguns

http://www.nytimes.com/1999/09/20/us/fort-worth-remembers-those-killed-at-church.html?pagewanted=all&src=pm; http://www.nytimes.com/1999/09/18/us/death-in-a-church-the-overview-with-question-of-why-unanswered-fort-worth-mourns.html; http://www.vpc.org/studies/wgun990915.htm

http://www.nytimes.com/1999/09/20/us/fort-worth-remembers-those-killed-at-church.html?pagewanted=all&src=pm; http://www.nytimes.com/1999/09/18/us/death-in-a-church-the-overview-with-question-of-why-unanswered-fort-worth-mourns.html; http://www.vpc.org/studies/wgun990915.htm

Day trader Mark O. Barton, 44, who had recently lost a substantial sum of money, went on a shooting spree through two day-trading firms. He started at the All-Tech Investment Group, where he worked, then went on to Momentum Securities. He fled and hours later, after being cornered by police outside a gas station, committed suicide. (Two days before the spree, he killed his wife and two children with a hammer.)

In letters, he details his deep depression and downward spiral.

Glock purchased from gun store in Warner Robins, Ga.

Three semiautomatic handguns, one revolver

.45-caliber Colt 1911-A1, 9mm Glock 17, .25-caliber Raven Arms MP-25 semiautomatic handguns; .22-caliber Harrington & Richardson revolver

http://www.independent.co.uk/news/i-dont-plan-to-live-much-longer-just-long-enough-to-kill-the-people-that-greedily-sought-my-destruction-1109610.html; http://articles.cnn.com/1999-07-30/us/9907_30_atlanta.shooting.06_1_gladys-barton-debra-spivey-barton-note?_s=PM:US; http://www.vpc.org/studies/wgun990729.htm

http://www.independent.co.uk/news/i-dont-plan-to-live-much-longer-just-long-enough-to-kill-the-people-that-greedily-sought-my-destruction-1109610.html; http://articles.cnn.com/1999-07-30/us/9907_30_atlanta.shooting.06_1_gladys-barton-debra-spivey-barton-note?_s=PM:US; http://www.vpc.org/studies/wgun990729.htm

Eric Harris, 18, and Dylan Klebold, 17, opened fire throughout Columbine High School before committing suicide.

Harris was an alleged psychopath; Klebold was depressed and suicidal.

Purchased variously at Tanner Gun Show in Denver, Colo. and from an individual

One semiautomatic handgun (assault), one rifle (assault), two shotguns

9mm Intratec DC-9 semiautomatic handgun; 9mm Hi-Point 995 carbine rifle; 12-gauge sawed-off Savage Stevens 311D, 12-gauge sawed-off Savage Springfield 67H pump-action shotguns

http://www.usatoday.com/news/nation/2009-04-13-columbine-myths_N.htm; http://www.vpc.org/studies/wgun990420.htm; http://www.slate.com/articles/news_and_politics/assessment/2004/04/the_depressive_and_the_psychopath.html

http://www.usatoday.com/news/nation/2009-04-13-columbine-myths_N.htm; http://www.vpc.org/studies/wgun990420.htm; http://www.slate.com/articles/news_and_politics/assessment/2004/04/the_depressive_and_the_psychopath.html

After he was expelled for having a gun in his locker, Kipland P. Kinkel, 15, a freshman at Thurston High, went on a shooting spree, killing his parents at home and two students at school. Five classmates wrestled Kipland to the ground before he was arrested.

Doctors testified that he was a paranoid schizophrenic who suffered from hallucinations

Purchased variously from friend and father, and stolen from father

Two semiautomatic handguns, one rifle

9mm Glock, .22-caliber Ruger semiautomatic handguns, .22-caliber Ruger rifle

http://www.katu.com/news/local/8082147.html; http://www.pbs.org/wgbh/pages/frontline/shows/kinkel/kip/cron.html; http://www.oregonlive.com/special/index.ssf/2008/05/the_suspect_kipland_kinkels_da.html; http://articles.cnn.com/2000-01-21/us/kinkel.revisited_1_kip-kinkel-thurston-high-school-oregon-school-shooting?_s=PM:US

http://www.katu.com/news/local/8082147.html; http://www.pbs.org/wgbh/pages/frontline/shows/kinkel/kip/cron.html; http://www.oregonlive.com/special/index.ssf/2008/05/the_suspect_kipland_kinkels_da.html; http://articles.cnn.com/2000-01-21/us/kinkel.revisited_1_kip-kinkel-thurston-high-school-oregon-school-shooting?_s=PM:US

Mitchell Scott Johnson, 13, and Andrew Douglas Golden, 11, two juveniles, ambushed students and teachers as they left the school; they were apprehended by police at the scene.

Boys displayed unruly and aggressive behavior. They picked on kids and made threats about killing people.

Stolen from grandfather and father

Two semiautomatic handguns, two rifles, three revolvers, two derringers

FIE 380, .380-caliber Star semiautomatic handguns; .44 Magnum Ruger, .30-06 Remington 742, .30-caliber Universal M-1 carbine replica rifles; .38-caliber Charter Arms, .357-caliber Ruger Security Six, .38-caliber Smith & Wesson revolvers; .22-caliber Double Deuce Buddie two-shot, .38-caliber Davis Industries two-shot derringers

http://www.vpc.org/studies/wgun980324.htm; https://www.nytimes.com/1998/04/18/us/jonesboro-dazed-by-its-darkest-day.html

Lottery worker Matthew Beck, 35, gunned down four bosses over a salary dispute before committing suicide.

He had been hospitalized for psychiatric reasons and had a history of depression

One semiautomatic handgun

9mm semiautomatic handgun

http://www.nytimes.com/1998/03/07/nyregion/rampage-connecticut-overview-connecticut-lottery-worker-kills-4-bosses-then.html?pagewanted=all&src=pm; http://www.nytimes.com/2000/04/11/us/hole-in-gun-control-law-lets-mentally-ill-through.html?pagewanted=all&src=pm

http://www.nytimes.com/1998/03/07/nyregion/rampage-connecticut-overview-connecticut-lottery-worker-kills-4-bosses-then.html?pagewanted=all&src=pm; http://www.nytimes.com/2000/04/11/us/hole-in-gun-control-law-lets-mentally-ill-through.html?pagewanted=all&src=pm

Former Caltrans employee Arturo Reyes Torres, 41, opened fire at a maintenance yard after he was fired for allegedly selling government materials he'd stolen from work. He was shot dead by police.

He was disgruntled after being fired.

B&B Gun Sales in Orange County, Calif.

7.62mm AK-47 Chinese variant semiautomatic rifle

http://articles.latimes.com/1997/dec/20/news/mn-431; http://articles.latimes.com/1997/dec/22/local/me-1156; http://www.vpc.org/studies/wgun971218.htm; http://news.google.com/newspapers?id=DitZAAAAIBAJ&sjid=LEcNAAAAIBAJ&pg=6705,2243998&dq=arturo+reyes+torres+caltrans&hl=en

http://articles.latimes.com/1997/dec/20/news/mn-431; http://articles.latimes.com/1997/dec/22/local/me-1156; http://www.vpc.org/studies/wgun971218.htm; http://news.google.com/newspapers?id=DitZAAAAIBAJ&sjid=LEcNAAAAIBAJ&pg=6705,2243998&dq=arturo+reyes+torres+caltrans&hl=en

Ex-con Hastings Arthur Wise, 43, opened fire at the R.E. Phelon Company in retaliation for being fired after an argument with a supervisor. He attempted suicide by ingesting insecticide, failed, and was executed by the state of South Carolina eight years later.

An ex-con, he had been freed from prison, although he displayed violent tendencies.

One semiautomatic handgun

9mm semiautomatic handgun

http://www.vpc.org/studies/wgun970915.htm; http://chronicle.augusta.com/stories/1997/09/18/met_214833.shtml

http://www.vpc.org/studies/wgun970915.htm; http://chronicle.augusta.com/stories/1997/09/18/met_214833.shtml

Fired city park employee Clifton McCree, 41, opened fire on former coworkers he called "racist devils" inside their municipal trailer in an act of revenge after failing a drug test. He then committed suicide.

Co-workers complained about his threats and verbal abuse. His supervisors asked him to get a psychiatric evaluation. He lost his job, which relatives said drove his depression.

One semiautomatic handgun, one revolver

9mm Glock semiautomatic handgun; .32-caliber revolver

http://www.nytimes.com/1996/02/11/us/florida-killer-said-victims-were-racists-police-say.html; http://articles.sun-sentinel.com/1996-02-10/news/9602090635_1_million-firearms-multiple-guns-reloading

http://www.nytimes.com/1996/02/11/us/florida-killer-said-victims-were-racists-police-say.html; http://articles.sun-sentinel.com/1996-02-10/news/9602090635_1_million-firearms-multiple-guns-reloading

Disgruntled former metallurgist James Daniel Simpson, 28, opened fire throughout the Walter Rossler Company where he had worked before exiting the building and committing suicide.

He was likely angry because he was given an assignment at work he didn't like. But acquaintances didn't know why he'd come back and kill.

One semiautomatic handgun, one revolver

9mm Ruger semiautomatic handgun; .32-caliber revolver

http://web.caller.com/2000/april/03/today/local_ne/4127.html

Fairchild Air Force Base, Washington

Former airman Dean Allen Mellberg, 20, opened fire inside a hospital at the Fairchild Air Force Base before he was shot dead by a military police officer outside.

He was repeatedly diagnosed with emotional problems during his two years of service.

Gun dealer in Spokane, Wash.

MAK-90 semiautomatic rifle

http://articles.latimes.com/1994-06-22/news/mn-7137_1_air-force; http://www.nytimes.com/1994/06/22/us/an-airman-s-revenge-5-minutes-of-terror.html

http://articles.latimes.com/1994-06-22/news/mn-7137_1_air-force; http://www.nytimes.com/1994/06/22/us/an-airman-s-revenge-5-minutes-of-terror.html

Nathan Dunlap, 19, a recently fired Chuck E. Cheese's employee, went on a rampage through his former workplace and was arrested the following day. He now awaits execution on death row.

While he was in prison awaiting trial, he started acting bizarre by stripping naked and playing with his feces, apparently to avoid the death penalty. A state doctor testified that Dunlap was was faking his mental illness.

One semiautomatic handgun

.25-caliber semiautomatic handgun

http://www.denverpost.com/news/ci_20218952/aurora-chuck-e-cheese-killers-appeal-cites-mental; http://abcnews.go.com/US/auroras-massacre-victims-20-year-wait-justice/story?id=16847013; http://www.5280.com/magazine/2008/12/politics-killing?page=0,6

http://www.denverpost.com/news/ci_20218952/aurora-chuck-e-cheese-killers-appeal-cites-mental; http://abcnews.go.com/US/auroras-massacre-victims-20-year-wait-justice/story?id=16847013; http://www.5280.com/magazine/2008/12/politics-killing?page=0,6

Colin Ferguson, 35, opened fire on an eastbound Long Island Rail Road train as it approached a Garden City station. He was later arrested.

Psychiatrists and others said he suffered from racial paranoia and was obsessed with nonexistent conspiracies. His landlord said he had "delusions of grandeur."

Turner's Outdoorsman in Signal Hill, Calif.

One semiautomatic handgun

9mm Ruger P89 semiautomatic handgun

http://www.nytimes.com/1993/12/12/nyregion/tormented-life-special-report-long-slide-privilege-ends-slaughter-train.html; http://www.vpc.org/studies/wgun931207.htm

http://www.nytimes.com/1993/12/12/nyregion/tormented-life-special-report-long-slide-privilege-ends-slaughter-train.html; http://www.vpc.org/studies/wgun931207.htm

Fayetteville, North Carolina

Army Sgt. Kenneth Junior French, 22, opened fire inside Luigi's Italian restaurant while ranting about gays in the military before he was shot and arrested by police.

He had an abusive father, who committed suicide.

.22-caliber rifle; two 12-gauge shotguns

http://articles.latimes.com/1993-08-08/news/mn-21847_1_kills-army-french; http://news.google.com/newspapers?id=0AhPAAAAIBAJ&sjid=jhUEAAAAIBAJ&pg=6505,2482529&dq=kenneth+junior+french&hl=en

http://articles.latimes.com/1993-08-08/news/mn-21847_1_kills-army-french; http://news.google.com/newspapers?id=0AhPAAAAIBAJ&sjid=jhUEAAAAIBAJ&pg=6505,2482529&dq=kenneth+junior+french&hl=en

San Francisco, California

Failed businessman Gian Luigi Ferri, 55, opened fire throughout an office building before he committed suicide inside as police pursued him.

He was down on his luck because of failed business decisions. One acquaintance said, "He was the least likely guy you can imagine doing something like that." His ex-wife said he "hated violence."

Super Pawn and Pacific Tactical Weapons, both in Las Vegas, Nev.

Three semiautomatic handguns (two assault)

Two Intratec DC-9, .45-caliber Colt semiautomatic handguns

http://articles.latimes.com/1993-07-03/news/mn-10731_1_mortgage-business/2; http://www.motherjones.com/print/16316; http://www.vpc.org/studies/wgun930701.htm

http://articles.latimes.com/1993-07-03/news/mn-10731_1_mortgage-business/2; http://www.motherjones.com/print/16316; http://www.vpc.org/studies/wgun930701.htm

John T. Miller, 50, killed four child-support workers in a county office building before turning the gun on himself. Miller was upset about a court order garnishing his paycheck to cover overdue child-support payments.

The day before the shooting, he told child-support collection office workers that he was considering suicide. He had been convicted of felonious assault for pointing a revolver at police officers responding to a domestic violence report at this girlfriend's apartment.

Mumford Sports in Litchfield, Ohio

One semiautomatic handgun

9mm Llama semiautomatic handgun

http://www.nytimes.com/1992/10/17/nyregion/shooting-followed-tougher-efforts-to-collect-child-support.html?pagewanted=2&src=pm; http://www.nytimes.com/1992/10/16/nyregion/gunman-kills-4-who-collected-child-payments.html?pagewanted=all&src=pm; http://www.nytimes.com/1992/10/24/nyregion/watkins-glen-killings-called-planned.html

http://www.nytimes.com/1992/10/17/nyregion/shooting-followed-tougher-efforts-to-collect-child-support.html?pagewanted=2&src=pm; http://www.nytimes.com/1992/10/16/nyregion/gunman-kills-4-who-collected-child-payments.html?pagewanted=all&src=pm; http://www.nytimes.com/1992/10/24/nyregion/watkins-glen-killings-called-planned.html

Former Lindhurst High School student Eric Houston, 20, angry about various personal failings, killed three students and a teacher at the school before surrendering to police after an eight-hour standoff. He was later sentenced to death.

He suffered violent physical abuse as a child. He claimed a teacher had sexually abused him, but the truth of that allegation was contested.

Local gun retailer

.22-caliber sawed-off rifle; 12-gauge pump-action shotgun

http://www.schoolshooters.info/PL/Subject-Houston_files/Nine%20Brief%20Sketches.pdf; http://www.appeal-democrat.com/news/school-47104-shooting-eckardt.html; http://nl.newsbank.com/nl-search/we/Archives?p_product=SB&p_theme=sb&p_action=search&p_maxdocs=200&p_topdoc=1&p_text_direct-0=0EB0D9D91FC593A0&p_field_direct-0=document_id&p_perpage=10&p_sort=YMD_date:D&s_trackval=GooglePM; http://www.sfgate.com/crime/article/Death-verdict-OKd-for-school-slaughter-3758444.php

http://www.schoolshooters.info/PL/Subject-Houston_files/Nine%20Brief%20Sketches.pdf; http://www.appeal-democrat.com/news/school-47104-shooting-eckardt.html; http://nl.newsbank.com/nl-search/we/Archives?p_product=SB&p_theme=sb&p_action=search&p_maxdocs=200&p_topdoc=1&p_text_direct-0=0EB0D9D91FC593A0&p_field_direct-0=document_id&p_perpage=10&p_sort=YMD_date:D&s_trackval=GooglePM; http://www.sfgate.com/crime/article/Death-verdict-OKd-for-school-slaughter-3758444.php

Laid-off postal worker Thomas McIlvane, 31, opened fire at his former workplace before committing suicide.

Police revoked his CCW permit after determining he was mentally unstable.

.22-caliber Ruger sawed-off semiautomatic rifle

http://www.nytimes.com/1991/11/15/us/ex-postal-worker-kills-3-and-wounds-6-in-michigan.html; http://www.mlive.com/news/detroit/index.ssf/2011/11/monday_ceremony_marks_20_years.html

http://www.nytimes.com/1991/11/15/us/ex-postal-worker-kills-3-and-wounds-6-in-michigan.html; http://www.mlive.com/news/detroit/index.ssf/2011/11/monday_ceremony_marks_20_years.html

Former graduate student Gang Lu, 28, went on a rampage on campus and then committed suicide at the scene.

He was described as darkly disturbed and isolated.

Fin & Feather in Iowa City, Iowa

.38-caliber Taurus revolver

http://www.nytimes.com/1991/11/03/us/gunman-in-iowa-wrote-of-plans-in-five-letters.html?pagewanted=all&src=pm; http://thegazette.com/2011/11/01/gang-lu-shootings-at-ui-remembered-20-years-later/; http://www.nytimes.com/1991/11/04/us/iowa-gunman-was-torn-by-academic-challenge.html?pagewanted=2&src=pm

http://www.nytimes.com/1991/11/03/us/gunman-in-iowa-wrote-of-plans-in-five-letters.html?pagewanted=all&src=pm; http://thegazette.com/2011/11/01/gang-lu-shootings-at-ui-remembered-20-years-later/; http://www.nytimes.com/1991/11/04/us/iowa-gunman-was-torn-by-academic-challenge.html?pagewanted=2&src=pm

George Hennard, 35, drove his pickup truck into a Luby's cafeteria and opened fire before committing suicide.

Acquaintances described him as troubled, unstable, combative, and misogynistic. He made convenience store employees "nervous."

Mike's Gun Shop in Henderson, Nev.

Two semiautomatic handguns

9mm Glock 17, 9mm Ruger P89 semiautomatic handguns

http://www.nytimes.com/1991/10/18/us/portrait-of-texas-killer-impatient-and-troubled.html?pagewanted=all&src=pm; http://www.kwtx.com/home/headlines/7048182.html; http://www.nytimes.com/1991/10/20/weekinreview/dead-23-texans-and-1-anti-gun-measure.html; http://www.vpc.org/studies/wgun911016.htm

http://www.nytimes.com/1991/10/20/weekinreview/dead-23-texans-and-1-anti-gun-measure.html; http://www.nytimes.com/1991/10/18/us/portrait-of-texas-killer-impatient-and-troubled.html?pagewanted=all&src=pm

http://www.nytimes.com/1991/10/18/us/portrait-of-texas-killer-impatient-and-troubled.html?pagewanted=all&src=pm; http://www.kwtx.com/home/headlines/7048182.html; http://www.nytimes.com/1991/10/20/weekinreview/dead-23-texans-and-1-anti-gun-measure.html; http://www.vpc.org/studies/wgun911016.htm

James Edward Pough, 42, opened fire at a General Motors Acceptance Corporation office before committing suicide. (The day prior, Pough killed a pimp and prostitute and injured two others. Those victims are not included in the mass murder count.)

Police speculated he had a "grudge" against the people he killed.

.30-caliber Universal M1 carbine rifle; .38-caliber revolver

http://www.nytimes.com/1990/06/19/us/florida-gunman-kills-8-and-wounds-6-in-office.html; http://www.nytimes.com/1990/06/20/us/hazy-records-helped-florida-gunman-buy-arms.html; http://www.vpc.org/studies/wgun900618.htm; http://www.nytimes.com/1990/06/19/us/florida-gunman-kills-8-and-wounds-6-in-office.html?pagewanted=all&src=pm

http://www.nytimes.com/1990/06/19/us/florida-gunman-kills-8-and-wounds-6-in-office.html; http://www.nytimes.com/1990/06/20/us/hazy-records-helped-florida-gunman-buy-arms.html; http://www.vpc.org/studies/wgun900618.htm; http://www.nytimes.com/1990/06/19/us/florida-gunman-kills-8-and-wounds-6-in-office.html?pagewanted=all&src=pm

Joseph T. Wesbecker, 47, gunned down eight people at his former workplace before committing suicide.

Prior to the shooting, he had voluntarily checked into hospitals for mental problems at least twice and attempted suicide three times.

AK-47 purchased from Tilford's Gun Sales in Louisville, Ky.

Three semiautomatic handguns (two assault), one rifle (assault), one revolver

Two Intratec MAC-11, 9mm SIG Sauer semiautomatic handguns; AK-47 Chinese variant semiautomatic rifle; .38-caliber revolver

http://nl.newsbank.com/nl-search/we/Archives?p_product=LH&s_site=kentucky&p_multi=LH&p_theme=realcities&p_action=search&p_maxdocs=200&p_topdoc=1&p_text_direct-0=0EB73C025033DC82&p_field_direct-0=document_id&p_perpage=10&p_sort=YMD_date:D&s_trackval=GooglePM; http://www.nytimes.com/1989/09/16/us/disturbed-past-of-killer-of-7-is-unraveled.html?pagewanted=all&src=pm

http://nl.newsbank.com/nl-search/we/Archives?p_product=LH&s_site=kentucky&p_multi=LH&p_theme=realcities&p_action=search&p_maxdocs=200&p_topdoc=1&p_text_direct-0=0EB73C025033DC82&p_field_direct-0=document_id&p_perpage=10&p_sort=YMD_date:D&s_trackval=GooglePM; http://www.nytimes.com/1989/09/16/us/disturbed-past-of-killer-of-7-is-unraveled.html?pagewanted=all&src=pm

Patrick Purdy, 26, an alcoholic with a police record, launched an assault at Cleveland Elementary School, where many young Southeast Asian immigrants were enrolled. Purdy killed himself with a shot to the head.

He told a mental health professional he was "struggling to resist actions on thoughts which are destructive in nature." He also suffered from alcoholism.

Sandy Trading Post in Sandy, Ore.; Hunter Loan and Jewelry Co. in Stockton, Calif.

One semiautomatic handgun, one rifle (assault)

9mm Taurus semiautomatic handgun; AK-47 Chinese variant semiautomatic rifle

http://www.recordnet.com/apps/pbcs.dll/article?AID=/20090118/A_NEWS/901170304; http://news.google.com/newspapers?id=N8IzAAAAIBAJ&sjid=kDIHAAAAIBAJ&pg=6930,6475926&dq=patrick+purdy&hl=en; http://www.time.com/time/magazine/article/0,9171,151105,00.html

http://www.recordnet.com/apps/pbcs.dll/article?AID=/20090118/A_NEWS/901170304; http://news.google.com/newspapers?id=N8IzAAAAIBAJ&sjid=kDIHAAAAIBAJ&pg=6930,6475926&dq=patrick+purdy&hl=en; http://www.time.com/time/magazine/article/0,9171,151105,00.html

Former ESL Incorporated employee Richard Farley, 39, gunned down seven people at his former workplace, after stalking and harassing a coworker he was romantically interested in. He was later arrested and now sits on death row at San Quentin.

He stalked and harassed his colleague Laura Black for four years until she was granted a temporary restraining order aginst him. Before he was fired for his bizarre behavior, he was ordered to undergo psychological counseling.

Various sporting goods and gun stores in Northern California

Two semiautomatic handguns, one rifle, two revolvers, two shotguns

.380 ACP Browning, 9mm Smith & Wesson semiautomatic handguns; Ruger M-77 .22-250 bolt-action rifle with scope; Mossberg 12-gauge pump-action, 12-gauge Benelli semiautomatic shotguns; .357 Magnum Smith & Wesson, .22 Sentinel WMR revolvers

http://articles.latimes.com/1988-02-18/news/mn-43514_1_mr-farley-richard-farley-sunnyvale-public-safety-department; http://news.google.com/newspapers?id=uqxAAAAAIBAJ&sjid=sDIHAAAAIBAJ&pg=2425,5898911&dq=richard+farley+shooting&hl=en; http://news.google.com/newspapers?id=FmYzAAAAIBAJ&sjid=WzIHAAAAIBAJ&pg=7028,576811&dq=richard+farley+shooting&hl=en

http://books.google.com/books?id=JiQUkwBnzgYC&pg=PA44&lpg=PA44&dq=richard+farley+ESL+psychological&source=bl&ots=PqxDlDtznK&sig=K-p8vEN7M2AEdRC0KpxVHjXZN7M&hl=en#v=onepage&q=richard%20farley%20ESL%20psychological&f=false; http://caselaw.findlaw.com/ca-supreme-court/1295931.html

http://articles.latimes.com/1988-02-18/news/mn-43514_1_mr-farley-richard-farley-sunnyvale-public-safety-department; http://news.google.com/newspapers?id=uqxAAAAAIBAJ&sjid=sDIHAAAAIBAJ&pg=2425,5898911&dq=richard+farley+shooting&hl=en; http://news.google.com/newspapers?id=FmYzAAAAIBAJ&sjid=WzIHAAAAIBAJ&pg=7028,576811&dq=richard+farley+shooting&hl=en

Retired librarian William Cruse, 59, was paranoid neighbors gossiped that he was gay. He drove to a Publix supermarket, killing two Florida Tech students en route before opening fire outside and killing a woman. He then drove to a Winn-Dixie supermarket and killed three more, including two police officers. Cruse was arrested after taking a hostage and died on death row in 2009.

He suffered from paranoid delusions. A judge found that he suffered from "extreme mental illness."

Gun store in Norwood, Ohio; The Oaks Trading Post in Melbourne, Fla.

One rifle, one revolver, one shotgun

Sturm, Ruger Mini-14 semiautomatic rifle; 20-gauge Winchester pump-action shotgun; .357 Ruger Blackhawk revolver

(Supreme Court of Florida Document) http://www.murderpedia.org/male.C/images/cruse_william_b/op-74656.pdf

http://articles.latimes.com/1987-04-25/news/mn-990_1_palm-bay-police

Postal worker Patrick Sherrill, 44, opened fire at a post office before committing suicide.

He was worried he had inherited mental problems and rebuffed a pastor's suggestion he seek psychiatric counseling. His family members denied he had a history of mental illness.

Issued by Oklahoma National Guard, where Sherrill served, for target competition

Three semiautomatic handguns

.22-caliber, two .45-caliber Colt Model 1911-A1 semiautomatic handguns

http://news.google.com/newspapers?id=dm8aAAAAIBAJ&sjid=pyoEAAAAIBAJ&pg=2297,4870051&dq=patrick+sherrill&hl=en

James Oliver Huberty, 41, opened fire in a McDonald's restaurant before he was shot dead by a police officer.

The day before the shooting, he tried to make an appointment at a mental health clinic.

One semiautomatic handgun, one rifle (assault), one shotgun

9mm Browning P35 Hi-Power semiautomatic handgun; 9mm Israeli Military Industries Uzi Model A carbine semiautomatic rifle; 12-gauge Winchester 1200 pump-action shotgun

http://www.utsandiego.com/san-ysidro-massacre/; http://www.vpc.org/studies/wgun840718.htm

http://www.utsandiego.com/san-ysidro-massacre/; http://www.vpc.org/studies/wgun840718.htm

Abdelkrim Belachheb, 39, opened fire at an upscale nightclub after a woman rejected his advances. He was later arrested.

During his last meal with his wife, he confessed he was depressed and had visited psychiatric hospitals in Belgium.

Hines Boulevard Pawn Shop in Dallas, Texas

One semiautomatic handgun

9mm Smith & Wesson 459 semiautomatic handgun

http://books.google.com/books?id=Hr3OBwP-lbUC&pg=PA38&lpg=PA38&dq=Abdelkrim+Belachheb+mental&source=bl&ots=D56pgdNnnl&sig=grAT08P9HLfPoHVgwlXt8RfPHz0&hl=en&; http://www.nytimes.com/1984/06/30/us/6-die-in-dallas-club-as-enraged-man-fires-wildly.html; http://news.google.com/newspapers?id=gKQyAAAAIBAJ&sjid=WO8FAAAAIBAJ&pg=1236,2915759&dq=abdelkrim+belachheb&hl=en; http://books.google.com/books?id=Hr3OBwP-lbUC&pg=PA67&lpg=PA67&dq=%22hine+pawnshop%22+gun&source=bl&ots=D55vgfTsnk&sig=zDxr5nohKnNQWvLrUFmZGYQ5ar4&hl=en&sa=X&ei=9WZSUN2FN-XZigKN-oGoCA&ved=0CDcQ6AEwAA#v=onepage&q=%22hine%20pawnshop%22%20gun&f=false

http://books.google.com/books?id=Hr3OBwP-lbUC&pg=PA38&lpg=PA38&dq=Abdelkrim+Belachheb+mental&source=bl&ots=D56pgdNnnl&sig=grAT08P9HLfPoHVgwlXt8RfPHz0&hl=en&; http://www.nytimes.com/1984/06/30/us/6-die-in-dallas-club-as-enraged-man-fires-wildly.html; http://news.google.com/newspapers?id=gKQyAAAAIBAJ&sjid=WO8FAAAAIBAJ&pg=1236,2915759&dq=abdelkrim+belachheb&hl=en; http://books.google.com/books?id=Hr3OBwP-lbUC&pg=PA67&lpg=PA67&dq=%22hine+pawnshop%22+gun&source=bl&ots=D55vgfTsnk&sig=zDxr5nohKnNQWvLrUFmZGYQ5ar4&hl=en&sa=X&ei=9WZSUN2FN-XZigKN-oGoCA&ved=0CDcQ6AEwAA#v=onepage&q=%22hine%20pawnshop%22%20gun&f=false

Junior high school teacher Carl Robert Brown, 51, opened fire inside a welding shop and was later shot dead by a witness as he fled the scene.

His second wife left him because he refused to seek psychological help. He had become increasingly isolated. One former student said he was "off his rocker."

Garcia Gun Center in Hialeah, Fla.

Mossberg 500 Persuader pump-action shotgun with pistol grip

http://www.nytimes.com/1982/08/21/us/gunman-in-miami-kills-8-in-rampage.html; http://www.nytimes.com/1982/08/24/us/no-charges-planned-against-miami-man-who-shot-gunman.html; http://www.nytimes.com/1982/10/14/us/florida-city-rescinds-law-on-buying-guns.html

http://www.nytimes.com/1982/08/21/us/gunman-in-miami-kills-8-in-rampage.html; http://www.nytimes.com/1982/08/24/us/no-charges-planned-against-miami-man-who-shot-gunman.html; http://www.nytimes.com/1982/10/14/us/florida-city-rescinds-law-on-buying-guns.html