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

Carla Walker is raped and killed on Valentine's Day, 1974, leading to a cold case that takes 46 years to crack.

Police solve the decades-old cold case of Clare Holman through new advancements in DNA technology.

19-year-old Janet Stallcup is murdered in 1976; decades later, cutting-edge technology breaks the case open.

A forensic technique finally solves the decades-old mystery of Krisann Baxter's case.