In 1995, a masked man commits a series of sexual assaults at knifepoint. It takes more than 20 years for this serial rapist to be identified and then brought to justice.

In 1981, a female high school student is found dead on the side of a road. Police work tirelessly on the case until new DNA technology exposes the killer.

In 1977, the body of a young woman is discovered by blackberry pickers in Everett, Washington. The body is covered in flies and maggots. Police officers fail to identify the victim until revolutionary technology breaks open the case.

When a woman takes a genealogy test to learn what happened to her estranged mother, she is shocked to learn that her DNA has helped law enforcement identify a Jane Doe and identify the murderer of 4 other victims.

When two teens are found dead in Montana, detectives suspect an infamous gangster might be responsible. But it will take 65 years to find the true culprit.

Wisconsin 1976. 25-year-old David Schuldes and 24-year-old Ellen Matheys are murdered in a park. The case goes cold until 2015 when new DNA science is found.

In 1988, Janet Tinsley reports her 8-year-old daughter April missing after she fails to return home. Three days later, a man out jogging makes a gruesome discovery in a nearby ditch.

In Alexandria, Virginia in 2016 a young female lifeguard is raped while working at a local pool. Police learn of a similar incident in Fairfax, Virginia 2 years earlier. It takes ground-breaking genealogy tools to find the perpetrator.

After decades of searching, Ohio detectives use ground-breaking technology to hunt down the man who abducted and sexually assaulted a 19-year-old woman.

In 1992, a woman is sexually assaulted in Sacramento, California by a man wearing a ski mask. This sexual predator continues to commit heinous crimes until new evidence exposes his identity.

In 1999, hospital worker Jennifer Watkins was sexually assaulted and murdered. Two decades later, revolutionary DNA testing helps to solve this cold case.

In Colorado, in 1996, a young woman's body was found in an alley. After the case goes cold, advancements in genetic technology lead police to the killer.

69-year-old Evelynne Derricott is found brutally murdered in 2011. After the case goes cold, new DNA technology eventually leads detectives to the truth.

In 1994, 42-year-old Le Bich-Thuy is found dead next to her home. Decades later, DNA and genealogy technology allow detectives to track down the killer.

In 1982, a woman is found shot to death near Lake Tahoe. 37 years later, ground-breaking technology would help identify both the victim and the killer.

The murder of a respected teacher brutally attacked in her Pennsylvania home. Her death shocked the community, though it took 27 years for dedicated investigators trace her killer.

In 2018, two paralegals were shot dead whilst at work in Scottsdale, Arizona. Four more victims were linked to the killing - who was the serial killer?

In 1996, two workers report that they found a body rolled up in a blanket on the side of the road near Grand Rapids, Michigan. Detectives quickly identify the victim as Sharon Kay Hammack, but her killer identity remains unknown for years

In December 1987, the nude body of a 17-year-old girl was dumped on the side of a rural road in Ohio. She had been raped and strangled to death. Genetic genealogy is called upon to help solve this violent murder.

In 1986, in Kent, a teenage girl is on her way to the shops when she is attacked and sexually assaulted. Decades later, new DNA technology reveals the perpetrator.

On Valentines' Day 2007, police in Southern California were called to a particularly violent murder scene. Advances in forensic genealogy finally solved the case.

In March 2003, a lorry driver was found dead behind the wheel in Camberley, England. Police gambled on the revolutionary technique of familial DNA analysis.

In 1988, police discover the mutilated body of Lynette White. 25 years later, a ground-breaking DNA technique would finally lead detectives to the killer.

In 2003, the skeletal remains of a young woman are found.

In Willoughby, Ohio, Mark Madger comes home to find his wife Nadine lying in a pool of her own blood, stabbed to death. Four decades later, cutting-edge DNA science provides answers the Madger family have been waiting a lifetime for.

A small community in Utah is shocked when an elderly woman is brutally attacked in her own home. Detectives use innovative techniques to solve the case.

In 1997, two women are sexually assaulted in separate attacks. Forensic evidence suggests the crimes are linked, but it takes over two decades to find the perpetrator.

In the summer of 1976, the body of 16-year-old Carol Sue Klaber is found in a roadside ditch in Kentucky. Fast forward to 2022, cutting-edge DNA science is employed to finally name her killer.

When the body of a young woman is discovered in 1970, her family never loses hope that one day her killer will be identified; after 52 years, genetic genealogy provides the truth.

Dade County police in Georgia work to uncover the identity of a Jane Doe and locate the perpetrator responsible for her murder.

In 1968, the remains of an unidentified woman are discovered; detectives work for nearly half a century to identify the Jane Doe and the murderer who evaded law enforcement for 50 years.

In 1964, the body of a young girl is discovered in Hazleton, Pa. The community lives in fear that a child predator is hiding in plain sight. Over 50 years later, the truth is finally revealed.

40 years after the sexual assault and murder of 20-year-old Robin Brooks in Sacramento, California, determined cold case detectives collaborate with scientists using revolutionary forensic techniques to put her killer behind bars.

Investigative genetic genealogy is used to resolve the 1988 murder of a mother killed in front of her toddler

Investigative genetic genealogy reveals the killer of a young mother murdered in her own home 34 years prior.

A young woman is found beaten, raped and strangled in Garden Grove, California in 1987. Two years pass until a woman in a neighboring jurisdiction meets the same fate. It will take years before forensics identify this serial killer.

In 1990 Mississippi, a woman is kidnapped at knife-point. Police are unable to identify the perpetrator. It'll take forward-thinking investigators, state-of-the-art science and brave survivors to put this man behind bars.

DNA science unveils a predator who sexually assaulted a 20-year-old before shooting her in Washington in 1972.

A woman who was sexually assaulted at gunpoint in the 1980s contacts a genetic genealogist to solve her case.

Investigative genetic genealogy unmasks the sexual deviant who raped and killed Christina Castiglione in 1983

In Chandler, Arizona in 1991, an intruder viciously sexually assaults a woman in her own home. The case goes unsolved for decades until revolutionary science connects the dots.

In 1978, the body of 16-year-old Krisann Baxter is found in Washington. Investigators try to find Krisann's killer, but don't find any answers.

In 1989, 20-year-old Krista Martin’s life is tragically cut short when an intruder interrupts her dinner, leading to an investigation spanning four decades.

In 1976, 19-year-old Janet Stallcup goes missing in Garden Grove, California while on her way to a party. Eight days later, her body is found in her car. The case runs cold until 2020 when genetic genealogy solves her murder.

In 1976, a woman was left for dead in her home in southern California. Despite a major manhunt, the violent killer avoided detection for over four decades.

In 1984, a young woman's body was discovered in a lane close to her home in Bath, England. How did police eventually track down the perpetrator of this heinous attack?