The case of a man stabbed to death in a Manchester alley went unsolved for the next 30 years, until DNA profiling became advanced enough to identify the killer.

Detectives encounter a tough case when a mother finds her son's dead body at his home.

A woman disappears and an investigation identifies the likely culprit to be her boyfriend.

Soon after the corpses of two teens were found, a decades-spanning investigation began.

In a nine-year investigation, detectives unpick the disappearance of a 17-year-old-girl.

A mishandled prosecution ended in a murderer going free until new evidence came about.