Historical basis\n\n On November 13, 1974, Ronald DeFeo Jr. shot and killed six members of his family at 112 Ocean Avenue, a large Dutch Colonial house situated in a suburban neighborhood in Amityville, on the south shore of Long Island, New York.

In 1974, as his parents and four siblings slept in their three-story home in Long Island, New York, a 23-year-old Ronald DeFeo Jr. executed them. It was the stuff of unthinkable nightmares. In the aftermath it has been churned into books and a hit movie series, "The Amityville Horror."