Forensics: Catching the Killer

When his parents are found dead, a man does everything he can to avoid being caught - but Luminol reveals a vital clue.

Bite marks in a block of cheese hold the key to catching a killer when he helps himself to a snack after a home invasion.

A man insists his missing parents are on holiday, but a forensic investigation of their house shows signs of a vicious attack.

When the body of a 16-year-old girl is found in a field, it would take over two decades before a DNA profile of the killer can be developed.

Thirty years after three gruesome murders, familial DNA and the exhumation of a body finally closes the case.

Experts analyse sand found in a car when a man goes missing, which leads them to a body and a twisted murder case.