Unmasking A Killer

The terrifying true story of one of the nation's most prolific uncaught serial killers. Known first as the East Area Rapist, then the Original Night Stalker, and now the Golden State Killer, he's responsible for a staggering 51 attacks and 12 murders that we know of.

How does one get away with 51 attacks and 12 murders while assaulting inside people's very own homes? Delve into the creepy, sadistic methods of one of the worst serial killers of all time, the Golden State Killer.

The true story of how one serial killer wreaked havoc in California and changed our nation's laws as we know them. Everything from rape crisis centers, to 911 emergency services and DNA collection laws were influences by this one criminal - the Golden State Killer.

When dealing with a serial rapist and killer, it's not only the crime scenes that are revealing, it's also the serial behaviors that offer clues of the offender's identity. Criminal psychologists show us the hidden meaning behind the Golden State Killer's crimes and reveal what this tells us about him.

Investigators analyze the evidence and explore the various theories as to who this ruthless barbarian could be. What job could have afforded him the time doe these heinous crimes? Where could he have lived? And how, for forty years, has he managed 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. Now accused of committing some of California's most heinous crimes, this man was hiding in plain sight. Hear from those who knew him and the investigators who spent a lifetime tracking him down.