Season 4

A fugitive has at least 9 victims known to police over the course of 15 years. They had his DNA even, but still no suspect. That is until new advances in familial DNA is compared 27 years after the first known attack in 1991.

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.

In July 1987, Donna Hyatt's daughter finds her mother brutally murdered at home in Carlsbad, New Mexico. Donna Sue Hyatt's murder is unsolved for decades until modern forensic science catches up.

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

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.

Two unsolved murders from the late 1970s near Tahoe, Calif., stump investigators for decades.

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.

Cutting-edge DNA science finally names the Phoenix Canal Killer who terrorized the city in the early 90s.

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.

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 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

The 1972 rape and murder of 9-year-old Debbie Lynn Randall is solved thanks to new science 50 years later.