Unmasking a Killer - Episode Guide

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.

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.

How one serial killer wreaked havoc in California and changed the nation's laws. Everything from rape crisis centers, to 911 emergency services and DNA collection laws were influenced by the Golden State Killer. Yet, for 40 years the perverse predator has evaded capture. In 2016, however, law enforcement and the FBI launched a massive nationwide manhunt and are hot on his trail.

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 explain the hidden meaning behind the Golden State Killer's crimes and what it says about him.

Investigators analyze the evidence and explore the various theories as to who this ruthless barbarian could be, including what job could have afforded him the time to commit his heinous crimes; where he may have lived; and how he managed avoid detection.

After a 40-year manhunt, investigators finally find their needle in a DNA haystack and unmask the man who may be 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.