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When a 12-year-old boy is fatally stabbed in a park on his way home from school, police suspect a 14-year-old but need forensics to prove he is the killer.

When CCTV captures the violent sexual attack of a woman in a public phone box in Birmingham, police and forensic teams race to identify the attacker before he can strike again.

When a teenager is left fighting for his life after a stabbing in a car park, forensics must prove whether two brothers arrested nearby are the attackers or victims.

West Midlands and Cumbria Police join forces, determined to find forensics that will take down a brazen gang of ATM thieves who have been attacking cashpoints across the country.

Police and forensic teams urgently need to track down a stranger who has broken into a house in the middle of the night and sexually assaulted an 11-year-old child.