
Detectives and forensic experts recount the most extraordinary cold cases that were solved using the revolutionary technique of familial DNA testing.
In 1979 two young boys find their mother's dead body in the living room; how the investigators track down the killer with no solid leads.
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.
A lorry driver is found dead behind the wheel in Camberley, England; police use a revolutionary technique of familial DNA analysis.
A young woman's body is discovered close to her home in Bath, England; police eventually track down the perpetrator of the heinous attack.