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A look at how forensic science can help police solve serious crimes where the truth seems impossible to uncover. As the various twists and turns of each case unfold, the role of forensic science in providing answers is highlighted and examined.
...Killer. The Soham Murders: The 2002 murders of Holly Wells and Jessica Chapman horrified and shook the nation. Explore how forensic science helped find their killer. (S3, ep 1)
...Killer. Murder in Suburbia: 35-year-old Zara Aleena was beaten to death just ten minutes from her home. The only evidence of the killer was one bloody fingerprint. (S3, ep 2)
...Killer. Murder on the Moor: In 1975, school girl Lesley Molseed went to the shops and never came home. Could one 30-year-old piece of evidence reveal her killer? (S3, ep 3)
...Killer. The Happy Slapping Killing: Larger-than-life David Morley survived a bombing in London, only to be beaten to death five years later on a night out. (S3, ep 4)
...Killer. Murder in the Woods: Mum Karen Doubleday was found murdered in the woods in 2002. The key to finding her killer lay in pollen spores from the Ice Age. (S3, ep 5)
...Killer. Murder in the Playground: Naomi Smith went to post a letter for her mother and never returned. Could a bite mark on her body help find her killer? (S3, ep 6)
...Killer. The Mum Who Never Came Home: After Michelle Gunshon disappeared, police found CCTV footage showing her with a mystery man. They tracked him down, but where was she? (S3, ep 7)
...Killer. Catching the Rochdale Ripper: When mum of three Eileen Jawczak was murdered, clues were minimal. Could police link her death to the Rochdale Ripper? (S3, ep 8)
...Killer. Catching the Midlands Ripper: Two bodies are found just months apart in Leicestershire, but when the case goes cold, one woman's bravery could be key. (S3, ep 9)