Catching History's Criminals: Forensic Story

This program reveals the cutting edge science that's keeping detectives one step ahead of the criminals. There was a time when obscuring the identity of the victim would ensure the killer escaped justice, but the emergence of forensic science would turn the tables on the murderer.

Every contact leaves a trace. The killer will leave something at the scene of the crime - hairs, fibers or they will take something away with them, such as the soil on their shoes. This program examines four cases all concerned with the interpretation of evidence.

The key piece of evidence that detectives are always desperate to find is the murder weapon, which can hold vital clues that will expose the killer. This episode looks at murder cases with unusual weapons.