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Unmasking a Killer

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Is one of America's most prolific uncaught serial killers still alive, and will a new $50,000 reward finally help collar the sadistic criminal? Now known as the Golden State Killer and responsible for at least 12 murders in California, the man investigators have sought for 40 years may be linked to another series of unsolved crimes, raising a key to perhaps solving the case. This five-part docuseries is an in-depth look at the manhunt, patterns, escape methods and mind games of the killer. It also includes interviews with investigators, law enforcement and victims, who offer information to help solve the mystery of a man who has managed to escape justice for decades.

Latest episodes

aired 33 days ago
Investigators spend four decades tracking down the Golden State Killer before finally identifying a suspect who was hiding in plain sight.
aired 33 days ago
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.
aired 33 days ago
Investigators analyze evidence and explore the various theories as to the identity of the Golden State Killer, what job could have afforded him the time to perpetrate his heinous crimes, and where he could he have possibly lived.
aired 33 days ago
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.
aired 33 days ago
The true story of how one serial killer wreaked havoc in California, leading to new laws and influencing rape crisis centers, 911 emergency services and DNA collection laws.
aired 33 days ago
Delving into the sadistic methods of the Golden State Killer, one of the worst serial killers of all time, who managed to get away with 51 attacks and 12 murders while assaulting people inside their own homes.
aired 33 days ago
The 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.

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Various networks
Is one of America's most prolific uncaught serial killers still alive, and will a new $50,000 reward finally help collar the sadistic criminal? Now known as the Golden State Killer and responsible for at least 12 murders in California, the man investigators have sought for 40 years may be linked to another series of unsolved crimes, raising a key to perhaps solving the case. This five-part docuseries is an in-depth look at the manhunt, patterns, escape methods and mind games of the killer. It also includes interviews with investigators, law enforcement and victims, who offer information to help solve the mystery of a man who has managed to escape justice for decades.
Various networks
In a four-part docuseries, cold case expert Paul Holes joins former law enforcement officials, citizen sleuths, district attorneys and victims themselves to present fresh perspectives on a crime spree that has affected Californians for generations. The investigation into the person responsible for raping more than 50 women and killing 10 people dates back to 1974 and remains open to this day. Exploring 40 years worth of evidence, Holes uncovers new leads by focusing on advanced DNA technology and using audio analysis and geographic profiling. The series also features insight from survivors, friends and family of victims, and detectives past and present.
Various networks
What lurks in the shadows during graveyard shifts comes to light in this series, a quintessential Investigation Discovery offering that features nail-biting re-enactments of actual crimes in which darkness hides predators hungry for a midnight snack. Told through interviews with victims' family members and law enforcement, each story begins after a brutal crime is committed in the quiet of the night, and community members are left wondering who might be next. Investigators get to work, knowing that each time the sun sets, the body count might rise.
Various networks
In the Upper Peninsula of Michigan, police Chief Laura Frizzo opens a missing person case to find 51-year-old Chris Regan. Over the course of two-plus years, the investigation turns into a cat and mouse pursuit that ultimately snares a serial killer whom Frizzo describes as pure evil. "Dead North" chronicles the chief's dogged determination to solve the case, one that alludes to cannibalism, reveals human remains and uncovers a deadly love triangle. The docuseries includes extensive bodycam footage and interrogation room conversations, concluding with a stunning confrontation between two women on opposite sides of the law.
Various networks
On the outskirts of Los Angeles lay the city's roughest neighborhoods, the stomping grounds for LAPD Detective Lindy Gligorijevicin in the late 1990s. During that time, the police department's Foothill Homicide Unit investigated hundreds of murders, but only Gligorijevic -- driven by the need to give victims a voice -- earned the moniker "the killer closer." In this series, she revisits her most shocking cases, detailing how she solved them and the ways in which she convinced cold-blooded killers to confess.
Various networks
Since May 2014, six women in Chillicothe, Ohio, have gone missing or been found dead, leading the local community to fear a serial killer is responsible. Granted unprecedented access, Investigation Discovery teams with law enforcement, victims' loved ones, and the town's residents to document the investigation as it unfolds in an effort to help solve the open cases. Six hourlong episodes detail the circumstances, facts and evidence surrounding each disappearance. While the victims are believed to have known each other in some way, three of the women have been found dead in or near bodies of water, one was found shot to death, and two remain missing.
Various networks
There's a reason murder investigations don't begin with preconceived notions. Sometimes those least expected to be capable of committing such dark deeds -- respected role models and trusted members of the community -- can have a sinister side. "Unusual Suspects" documents baffling, challenging investigations, actual cases that were anything but cut and dry. Episodes feature in-depth interviews with leading law enforcement personnel combined with stylized re-enactments, illustrating how illusive offenders evaded capture for years before being undone by persistent police work.
Various networks
Crime author and investigator Jax Miller and former police investigator Sarah Cailean tackle a mystery that has stumped authorities for nearly two decades -- the confounding cold case of Lauria Bible and Ashley Freeman, two Oklahoma teenagers who disappeared in December 1999 after the Freeman family trailer was burned to the ground. In the four-part documentary series, the investigators delve into the many strange theories of the case and unravel a much larger story of unsolved murder, allegations of cover-up and corruption, and a truth that proves even more incredible.
Various networks
From the moment a homicide is reported, a file is assembled to document every facet of the investigation -- crime scene photos, notes and observations, forensic reports, witness interviews, suspect profiles -- and continues to grow with new information until an arrest is made and conviction attained. Investigation Discovery opens these "murder books" to tell haunting tales buried within the pages. Hourlong episodes take viewers back in time with details of decades-old cold cases using actual archival footage, crime-scene evidence and first-person interviews with lead investigators, unraveling the mystery and uncovering what broke the cases open.