Episode Overview
Gangs draw in members with the allure of respect, wealth, and influence, yet they are behind some of the most heinous crimes, including armed robbery and murder. What compels these criminals to take lives? Forensic psychiatrist Dr. Michael Stone investigates the world's most dangerous gangsters, exploring the chilling stories of Richard Kuklinski, a psychopathic mafia hitman; Paul and Herman Petrillo, who lead a lethal murder syndicate in Philadelphia; Ervil LeBaron, a polygamist Mormon leader running his church with mafia-like authority; and Ismael Cisneros, whose ties to MS-13 lead him to kill a close friend. Dr. Stone also interviews Joseph Salcedo, a Los Angeles gangster imprisoned for a retaliatory murder. Using his scale of evil, he evaluates each killer's brutal actions to identify the most malevolent among them.