Killer sentenced to death for the brutal rape and murder of two young boys in 1993.
He was hit by a car as a child and suffered severe headaches and blackouts in the years after.
He is suspected of being connected to many other unsolved murders.
He married once in the 1980s and they had one son, but he physically abused his wife and they soon divorced.
He raped and murdered young boys, as did serial killer John Wayne Gacy.