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

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.

Following the decadeslong investigation into the murder of Helene Pruszynski.

In 1979, Kim Bryant's body is discovered in the Las Vegas desert; it takes law enforcement 40 years to name her killer.

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