Watch The Amityville Murders (2018) HD Full Movie Free on SolarMovie. Watch The Amityville Murders (2018) online free. On the night of November 13, 1974, Ronald DeFeo, Jr. took a high-powered rifle and murdered his enti...On the night of November 13, 1974, Ronald DeFeo, Jr. took a high-powered rifle and murdered his entire family as they slept. At his trial, DeFeo claimed that "voices" in the house commanded him to kill. This is their story.