Evil and Infamous (2007)

Serial killers compel a kind of gruesome fascination, and this documentary dives deep to explore the twisted minds of some of the most notorious murderers in history, including David Berkowitz (aka the "Son of Sam"), Ed Gein and more. Not for the faint of heart, this film considers the cruelty of the killers and the shocking motivations behind their heinous crimes, as well as the similarities to other acts of violence, from hate crimes to road rage.