Watch Unmasking a Killer Season 1 in Australia

For forty years investigators have been on the manhunt for this sadistic criminal and recent evidence suggests he may still be alive. With the FBI offering a $50,000 reward, the investigation is hotter than ever.

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. Find out his signature calling card and discover how law enforcement was able to link his crimes long before DNA. Don’t be afraid to be terrified.

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 influenced by this one criminal – the Golden State Killer. Yet, for forty years this perverse predator has evaded capture … but perhaps not for long. In 2016 law enforcement and the FBI launched a massive nationwide manhunt and are hot on the trail.

When dealing with a serial rapist and killer (51 attacks and 12 murders), 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. Delve into the mind of a psychopathic killer as we analyze his motives, his personality, his upbringing, and most importantly, what he might be doing today. Could you know the Golden State Killer?

With 51 attacks and 12 murders, the Golden State Killer is one of the most prolific uncaught serial killers in U.S. History … but who is he? Join us as 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 for these heinous crimes? Where could he have lived? And how, for forty years, has he managed to fly so successfully under the radar? Now investigators believe the key to catching the Golden State Killer may lie in another series of unsolved crimes…

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 DeAngelo. Now accused of committing some of California's most heinous crimes, this man was hiding in plain sight.