— in 1974, ronald defeo jr. Fatally shot his parents and four younger siblings in their long island home — then blamed the murder spree on demons. On the day that his. — ronald defeo jr. , the convicted killer whose 1974 murders spawned the “amityville horror” franchise, died last week while serving a 25 to life prison term, officials said. He had made multiple. — infamous 'amityville horror' killer ronald defeo jr. Has died in prison. On march 12, 2021, it was announced that ronald defeo jr. , known as the amityville horror killer, died. — ronald butch defeo, jr. , is still alive as of 2021 and serving out his sentence at green haven correctional facility in beekman, new york. He has repeatedly attempted to. — robert defeo jr. Was just 23 years old when he reportedly massacred his family including his parents, two brothers, and two sisters. His name was explicitly used in the movie. — ronald defeo died on friday at albany medical center. He was taken to the hospital from a prison in the catskill mountains on feb. 2, state prison officials confirmed to. — the gist seems to be: Defeo, 23 at the time, killed only his father, who had been abusive; His mother, who was in bed with his father; And his eldest sister, dawn, 18. — ronald defeo, 69, died on friday at albany medical centre, where he was taken on 2 february from a prison in new york's catskill mountains, the state department of. Fatally shot his parents and his four younger siblings while they were. — it all unfolded on nov. — ronald defeo jr. , the long island man serving a life sentence for slaughtering his parents and four siblings in a 1974 crime that would inspire the amityville horror book and. — convicted “amityville horror” killer ronald defeo jr. , who in 1974 shot and killed his parents and four younger siblings inside their long island home in a grisly case that. — ronald defeo, 69, died friday at albany medical center, where he was taken feb. 2 from a prison in new york's catskill mountains, the state department of corrections. 13, 1974, ronald defeo jr. , the oldest of five children in the defeo family, alerted police that his parents and four siblings had been killed in a bloody rampage. — ronald butch defeo, who committed the murders at the heart of the amityville horror book and movies, has died in new york state custody. Defeo, 69, died march 12,.