

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.