18-year-old mum Samantha Madgin was brutally stabbed to death on a night out. Her mother and friends provide details of that horrific night.

18-year-old Josh Taylor was killed after a petty argument turned deadly. Josh's sister and father speak about the tragic events of that night.

When a 15-year-old boy was lured to a Liverpool park, tortured and left for dead, it was dubbed the 'Reservoir Dogs' murder. His three killers were 15.

A 17-year-old girl was out with friends in an East London park when she was stabbed by unknown assailants. Fatally, it was a case of mistaken identity.

The case of 20-year-old Sophie Lancaster, who was attacked and brutally beaten by a gang of teenagers. Sophie's mother and friends talk about the tragic events.

In Wiltshire, 17-year-old Ellie Gould was attacked and murdered by her ex-boyfriend. Ellie's parents and friends speak about the tragedy.