1974 familicide in New York, US
On November 13, 1974, six members of the DeFeo family were murdered in their home in Amityville, New York, United States. The sole surviving family member, 23-year-old Ronald DeFeo Jr., first claimed that his parents and four siblings were targeted in a contract killing by the American Mafia before confessing that he had committed the murders. DeFeo was found guilty of six counts of second degree murder and was sentenced to 25 years to life. The case inspired the book and film versions of The Amityville Horror.