
Detectives and forensic experts recount the most extraordinary cold cases that were solved using the revolutionary technique of familial DNA testing.
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.
After being reported missing, a young couple's bodies are discovered more than sixty miles apart; how the dedicated investigators eventually find the killer.