Lithuanian Vitas Plytnykas worked as an agricultural migrant worker in Scotland. He murdered a fellow worker, leaving her severed head to be found by children on a Scottish beach.

In the Summer of 1998, Graham Fisher stalked then stabbed young women before murdering and eating two of his victims.

John Cooper was a charming hot gun serial killer who murdered four hikers and terrorised camp sites for decades, raping and robbing campers.

A secret love triangle led to Jack Campbell murdering his love rival in a siege which shook Orkney Island.

Dubbed the 'body in the bag' killer, Green murdered women and dumped their bodies in bags. It was the first time new advances in forensic face mapping were used for identification.

Michael Ross was just 15 when he shot Shamsuddin Mahmood in the face and fled. When the police caught him a decade later, he was a Black Watch Sgt, guarding HM the Queen.