See the terrifying true story of one of America's most prolific uncaught serial killers, known first as the East Area Rapist and now the Golden State Killer. He's responsible for a staggering 51 attacks and 12 murders . . . that we know of.

How did the Golden State Killer get away with 51 attacks and 12 murders in victims' homes? Delve into the creepy, sadistic methods of one of America's most prolific serial killers.

The Golden State Killer wreaked havoc in California and changed our nation's laws as we know them. Yet this perverse predator evaded capture for 40 years. Why couldn’t he be stopped?

When dealing with a serial rapist and killer, the offender's behaviors can offer clues about their identity. Criminal psychologists reveal the hidden meaning behind the Golden State Killer's crimes and reveal what this tells us about him.

Investigators explore the various theories as to who the Golden State Killer could be. What job could have afforded him the time to do these heinous crimes? Where could he have lived? And how does he manage to fly so successfully under the radar?

After a 40-year manhunt, investigators finally find their needle in a DNA haystack and unmask a man who they suspect as California’s most prolific serial killer.

The Golden State Killer has been identified by law enforcement as Joseph James DeAngelo. Hear from those who knew him and the investigators who spent a lifetime tracking him down.