Licensed as a Security Guard by State Bureau of Collections and Investigative Services. Sunsequently hired and fired by three security services. Diagnosed as suffering from substance induced personality disorder. Arrested for firing a gun in El Dorado National Forest. Charged with vandalism, resisting arrest, and assault on a peace officer.
Attempts suicide in El Dorado County jail.
Is diagnosed as suicidal and homicidal while at that facility. Is sent to Placerville Psychiatric Health Facility for further evaluation. Sentenced to 45 days in jail and three years' summary probation. Commits murders at Cleveland School, then takes his life. Note that California had a mandatory 15 day waiting period for all handgun purchases, Purdy bought 5 handguns, the last specifically mentions passing the security check.