After Ron DeFeo Jr. finds his parents and younger siblings dead in their Amityville, New York, home, police begin to search for the killer. Host Donnie Wahlberg and local journalist Joel Martin revisit that horrific evening in 1974, the crime scene and the investigation — all in hopes of answering a question heavy on residents’ minds: “Who would murder an entire family in the dead of night?” To learn more about how HLN protects listener privacy, visit cnn.com/privacy