'Amityville Horror' killer Ronald DeFeo dies in prison at 69

“Amityville Horror” killer Ronald DeFeo — who killed his six family members in 1974 on Long Island — has died behind bars, according to officials.  DeFeo died Friday while serving a 25 years-to-life sentence at Sullivan Correctional facility in Fallsburg, New York, officials told Newsday. He was 69.