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Investigating the murder of 35-year-old Zara Aleena who was beaten to death just minutes from her home. The only evidence of the killer was one bloody fingerprint left at the scene.
The 2002 murders of Holly Wells and Jessica Chapman horrified and shook the nation. Explore how forensic science helped find their killer.
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?