FOX's Chanley Painter and veteran forensic psychologist Dr. Jeffrey Smalldon discuss the overarching patterns of extreme violence between some of the world's most notorious killers. Drawing from five decades of experience and insights from his memoir, That Beast Was Not Me: One Forensic Psychologist, Five Decades of Conversations with Killers. Dr. Smalldon opens up about the most disturbing case of his career, the origin behind his book's title, and what it was really like to sit down with Charles Manson, Ted Bundy, and John Wayne Gacy.