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

How the revolutionary new science of familial DNA helped catch a rapist.

The science of familial DNA is used to identify a rapist who eluded justice for years.

In 1999, hospital worker Jennifer Watkins is sexually assaulted and murdered; 20 years later, revolutionary DNA testing helps to solve the cold case.

In Sacramento, Calif., three woman are brutally assaulted by the same man; investigators use genealogy to track down the suspect.