Diocese of Tyler Safe Environment program-C.A.S.E. training. The Diocese of Tyler’s Safe Environment program is conducted cooperatively with parents, civil authorities, educators, and community organizations to provide education and training for children, youth, parents, ministers, educators, volunteers, and others about ways to make and maintain a safe environment for children and young people. A part of this program includes C.A.S.E. (Creating A Safe Environment) training for adults. *