Mental Illness and Domestic Violence Offenders having all rights to security jobs, access to getting any form of permit

I believe all of the mass murderers like Bundy Son Of Sam Helter Skelter LIRR Zodiac Amityville Killer and Charles Manson where all serial Killers with prior mental illness. Mental Illness Psychiatric Hospitals should prior to the releases of mental illness, domestic violence offenders be placed on a list seeing that they cannot apply, or have access of guns, have them removed, these patients monitered. If a hospital mandates these patients to see that there meds are taken, a place to live and not working in a security business or occupation that they again will be without access of guns, schools need to monitor children and see signs of these diseases note, AUTOMATIC HOSPITALISATIONS. TOO many people children are being killed in schools, churches , stores, fairs, by the mentally ill.