1. On January 17, 1989 Patrick Edward Purdy, 24, opened fire with a semiautomatic rifle on a Stockton, Calif. schoolyard, killing five children and wounding 29 other students and one teacher before turning the gun on himself. 3. Two young boys, Andrew Golden, 8, and Mitchell Johnson, 10, took seven guns to their Jonesboro, Ark. school on March 24, 1998 and after pulling the fire alarms to evacuate the school, killed four students and one teacher, with nine others wounded. Seven years later they were released from a juvenile detention center.