Police closed the case of the infamous Boston Strangler when Albert De Salvo confessed to the murder of 13 women. Recent forensic evidence reveals that in at least one of the murders police may have had the wrong man.
In 1971, a hijacker, named Dan Cooper, parachuted from a plane with a request of $200,000, crafting the FBI's only unsolved hijacking case. With help of modern forensics, experts hope DNA analysis will solve the mystery.
When Russia's last tsar, Nicholas II, and his family disappeared almost 100 years ago, eyewitnesses indicated the family was brutally murdered. Now scientists attempt to identify remains that were discovered near the possible murder site.