Season 1 2020 - 2021

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 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.

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 2018, two paralegals were shot dead while at work in Scottsdale, Arizona. Four more victims were linked to the killing - and a serial killer was supected of being at large.

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?

After being reported missing, a young couple's bodies were discovered more than 60 miles apart. Dedicated investigators set out to find their killer.

In 1979, two young boys came home from school to find their mother's dead body in the living room. Investigators set out to track down the killer with no firm leads.

After a young woman was found beaten to death in Wisconsin in 1984, the killer evaded detection for decades. However, a revolutionary DNA method later revealed his identity.

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.

Detectives and forensic experts recount the most extraordinary cold cases that were solved using the revolutionary technique of familial DNA testing.

The police investigation into the Washoe County murder.

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 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 2001, a young couple were brutally assaulted in Salisbury, Wiltshire. Over a decade later, new DNA technology helped lead investigators to the attacker.

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.

In 2001, a student is attacked in Williamsburg, Virginia and months later the attacker strikes again. Finally, new DNA technology reveals the perpetrator.

Following the decadeslong investigation into the murder of Helene Pruszynski.