Cold Case Files - The Flaming Gorge Falls/Caught in the Mail

Seizoen: 3 - Aflevering: 20 / 73 - Eerst uitgezonden: 14 mei 2001 - Episode ID: 55314

A man suspected of the cold case murder of his wife and son hatches a new plot to kill his mother and father; and detectives solve the 20-year-old murder of a teenager by tricking her killer into licking an envelope, then extracting DNA from the saliva.