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 they thought this ruthless barbarian could be. How, for over forty years, did he manage to fly so successfully under the radar?

This five-part docu-series profiles the 40 year search for the Golden State Killer, a man responsible for 51 attacks and 12 murders in California. Investigators have recent evidence that suggests he may still be alive.