Ten years after a 17-year-old girl is found strangled in the woods in small-town Kentucky, detectives uncover a terrible family secret.

A killer authors a book about his con-man past that becomes the key to solving a 29-year-old cold case of two high school sweethearts--and three other cold case murders--leading police to believe he could be the Zodiac Killer.

The case of a gruesome stabbing death of a bullied teenager remains unsolved for 27 years.

Halloween in a small town is cancelled indefinitely when a young girl is kidnapped and killed on her way home from a costume party.

The death of an elderly couple, Edward "Ed" and Wilhelmina "Minnie" Maurin Ed in Washington state on Christmas Eve 1985.

When 18-year-old Shannon Siders' body is found in the woods, everyone in the small town of Newaygo, Michigan, becomes a suspect--but no one is convicted of the crime.

When 31-year-old real estate appraiser Mike Williams mysteriously vanishes while duck hunting in the Florida swamps in December of 2000, authorities suspect he accidentally drowned. For sixteen years Mike’s disappearance remains a mystery. The case heats up when police receive a distress call from the victim’s wife in 2016. Featuring interviews with detectives and the victim’s mother as well as rare footage of the crime scene and recorded audio confessions with the accused, the episode explores how the disappearance unfolded into a sinister plot to cash in on millions of dollars of life insurance.

College student Brad Perry shows up to work his graveyard shift at the gas station and is never seen alive again.

Two decades after a close-knit family's loving aunt is stabbed in her home, detectives return to the crime scene and discover a pivotal clue hidden in plain view.

13 days after Pam Pitts disappears in 1988 her charred body is found at a popular hangout spot in the Arizona desert. When a second victim is discovered in a mineshaft, detectives suspect the killer may have known them both, but the truth is decades away.

When 23-year-old Tonya McKinley is found brutally murdered on New Years Day 1985, a little boy is left motherless. A family must wait 35 years for advancements in forensic science to finally catch a killer using familial DNA.

In March 1984, Jack Kennedy discovers his daughters brutally murdered. Their mother and niece spend their lives keeping the case alive. DNA leads nowhere. Thirty years later, an informant gives up a name. But the family's ordeal is far from over.

The murder of Tiffany Johnston rocks the town of Bethany, Oklahoma. DNA points to her killer over a decade later.

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The longest running cold case of a law enforcement officer in the United States was the murder of Sheriff's Lt. Joe Clark.

One family faces two unsolved murders of loved ones and authorities finally uncover the missing clue that leads to solve the case 13 years after the murders occurred.

When 36-year-old computer programmer Lisa Valdez fails to show up for work, her apartment manager finds her brutally murdered in her tiny studio. Her body is riddled with stab wounds, the walls are covered in blood. Evidence shows the killer cut off her long, dark hair, taking it as an apparent trophy. Detectives ask, could she be the victim of a brutal serial killer? Or was Lisa murdered by someone she knew? Clues left on an answering machine point to a co-worker who was known to have feelings for Lisa, but two bloody fingerprints left on a toilet seat clear him as a suspect, and the case goes cold for thirteen years. Things heat up when a detective gets a hit during a search of the state's DNA database, leading to an unsuspected person from Lisa's past.

When Sherry Leighty goes missing in 1999, her family is left wondering how a dedicated mother of three could vanish without a trace. A decade later, the cold case heats up when Sherry's sister launches a social media campaign to help solve her sister's mysterious disappearance. An online tip unearths the killer truth and a sinister family secret. Featuring an interview with Shelly Leighty, who never gave up on solving her sister's case, along with rare home video of Sherry and her family.

In August 1972, the body of Jody Loomis is found in the woods. 34 years later, the killer's DNA is recovered from Jody's old clothing but it isn't matched until 2018, when genetic genealogy helps point to one suspect--whose guilt must be proven in court.

On February 2, 2010, two masked gunmen commit a violent robbery and shoot Michael Temple Jr., rendering him a quadriplegic for five years before his death. In this unusual cold case, DNA from a knife is used to create a sketch of the killer.

Twenty-six years after a schoolteacher's murder, cold-case detectives get a break when a relative of the killer uploads DNA to a public genealogy website.

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No description available

No description available

On a bitter morning in 1980, radio intern Helene Pruszynski is found brutalized in a snowy field. After 37 years of fruitless leads, investigators tap into a public genealogy website that leads them across the country to the killer they've been hunting.