Episode Overview
Devious murderers and deceitful con artists manipulate those closest to them, wielding their cunning to evade justice. What motivates these treacherous minds, and who among them embodies true evil? Dr. Michael Stone examines the lives of those who meticulously plotted horrific crimes. Diane Downs claims a hitchhiker shot her children, but her surviving daughter insists it was her mother who fired the gun. Michael Swango, a gifted physician, harbored a sinister obsession, suspected of killing as many as 60 patients. John Robinson duped his family and community into believing he was a reputable businessman while actually profiting from the deaths of vulnerable women. Dr. Stone then heads to Georgia to speak with Martha Ann Johnson, convicted of murdering her daughter in a desperate bid to win back her husband. What enables these schemers to deceive those around them, and how do they differ from other types of killers?