A Killer's Mistake, Michael Danaher

In Elgin, Scotland, a young mother goes missing in 1998. Investigators fear they will never find out what happened until they discover the killer made a key mistake.

In Nottinghamshire, 1983, a 16-year-old girl is found raped and murdered. Police are stumped for decades, until advances in forensic technology enable them to find a DNA match.

In Virginia, 2009, student Morgan Harrington went missing. Her body was eventually found, but no culprit was identified until five years later, when another student goes missing.

In Texas, a patrol car policeman is obsessed with the idea of being a ‘Superman Cop.’ But when Susan Harrison spurns his advances, he goes rogue - and she ends up dead.

In Oxford, a debt-ridden man brutally stabs an antique dealer in a plot to steal a valuable book. A selfie taken by the killer proves a vital piece of evidence.

A successful young TV actress lived with her drug addicted brother. But when she asks him to leave, he reacts in the most brutal way – with a gruesome plan to hide his crime.

In Cleveland, a former US marine and convicted sex offender lures vulnerable women back to his home. Few make it out alive and police discover rotting corpses at his house.