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

Investigative genetic genealogy unmasks the sexual deviant who raped and killed Christina Castiglione in 1982.

In 1985, a young woman is awoken by an intruder in her apartment, who steals her valuables and sexually assaults her at gun-point.

In Willoughby, Ohio in 1980, Mark Madger comes home to find his wife Nadine lying in a pool of her own blood with a kitchen knife embedded in her chest.

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

In 1990, a woman in Rankin County, Mississippi, was kidnapped and raped at knifepoint, but the case went cold for decades until a DNA match from an unrelated crime identified the perpetrator.

Forensic science reveals the name of a serial killer who murdered two women in the late 80s, 30 years later.

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

Cutting-edge DNA science finally names the Phoenix Canal Killer who terrorised 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.

In California in 1968, a group of schoolboys find what they think is a scarecrow. The reality is much worse; it is the body of a woman who has been murdered

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

Using witness testimony, new interviews, archive footage and dramatic reconstructions, detectives delve into the murder of a young girl in Hazleton, Pa in 1964.

On the 16th of December in 1988, the tranquility of smalltown life is shattered forever when the body of a woman is found by a group of road workers on the interstate.

In 2003, the skeletal remains of a young woman are found and identified as Isabel Sanchez Bernal.

July 1987, Carlsbad, New Mexico, Donna Hyatt's daughter returns home to find her mother brutally murdered. She has been beaten, sexually assaulted and strangled to death.

40 years after the sexual assault and murder in April 1980 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.

For 15 years, northern California is haunted by a serial rapist until genetic genealogy finally reveals the identity of the elusive sexual predator.

In October 1970, 28-year-old court reporter Nancy Bennallack fails to show up for work, and her colleagues become worried.

A man discovers the body of a young woman in a ditch in Kentucky. The girl is identified as 16-year-old Carol Sue Klaber who was last seen riding her bike.