The 2002 murders of Holly Wells and Jessica Chapman horrified and shook the nation. Explore how forensic science helped find their killer.

In 2022, 35-year-old Zara Aleena was beaten to death just ten minutes from her London home, but the only evidence left by her brutal killer was one bloody fingerprint at the crime scene.

In 1975, 11-year-old schoolgirl Lesley Molseed went to the shops and never returned to her family home in West Yorkshire. The ensuing police investigation led to a tragic miscarriage of justice before DNA evidence identified the true killer.

Larger-than-life David Morley survived a terrorist bombing in London, only to be beaten to death five years later during a night out in the city.

Mum Karen Doubleday was found murdered in the woods in 2002. The clue to finding her killer lay in pollen spores from the Ice Age.

Teenager Naomi Smith went to post a letter for her mother in 1995 and never came back home, but a bite mark left on her body gave police crucial evidence to help reveal her killer.

After mum Michelle Gunshon disappeared, police found CCTV footage showing her with a mystery man. They managed to track him down, but where was she?

When mum of three Eileen Jawczak was murdered, clues were minimal. Could police link her death to the Rochdale Ripper?