Jeffrey Smalldon

Welcome to the official YouTube channel of Dr. Jeffrey Smalldon, a board-certified forensic psychologist with five decades of experience with some of the most notorious murderers in modern American history. Dr. Smalldon has evaluated over 1,000 murderers, consulted on close to 300 death penalty cases, and shared his insights on 60 Minutes II, Larry King Live, and 48 Hours. His memoir, That Beast Was Not Me: One Forensic Psychologist, Five Decades of Conversations with Killers, takes readers inside the minds of infamous criminals like Charles Manson, Ted Bundy, John Wayne Gacy, and Donald Harvey.

Here, Dr. Smalldon shares his journey—from corresponding with Manson Family members in his 20s to conducting evaluations of death penalty case defendants. Explore the psychology behind extreme violence and learn of Dr. Smalldon's extraordinary experiences, first as a young man with no expertise in criminal behavior and, later, as a board-certified forensic psychologist.