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

In 1967, Susan Galvin is found dead; the case is reopened with the help of forensic genealogy in 2018.

In 1988, an 8-year-old girl goes missing; three days later, the girl's body is found in a ditch.

In 2001, a 7-year-old girl is sexually assaulted on her way to school.

In 1974, a 17-year-old girl is found murdered inside a culvert.