A two year investigation into the random murder of Margaret Wilson, would lead police on one of the most complex and fascinating murder investigations in recent memory.

When Margaret McOnie is found dead on the cliff tops a nationwide manhunt followed. Her murderer would soon be revealed as a deadly conman and a double murderer.

When Danny Dyke tried playing the hardened drug dealer, he found himself in over his head, but it was his murderers ended up having sleepless nights.

When Michael Barber finds his wife Susan in bed with another man, she realises she has to take drastic measures to stop him leaving, but no one could suspect how far she would go.

Robert Mochrie killed his wife Catherine and their children James, Sian, Luke and Bethan in July 2000 at their home in Barry.

Miles Wiliam Gifford believed his parents owed him everything, and would stop at nothing to get what he needed for the lavish lifestyle he craved.

Retired doctor Alexander Wood and his wife Dorothy, both in their late seventies, were battered to death and hacked with a hammer in Dundee by Henry John Gallagher.

Brian Bishop was shot and killed in a shoot-out with an armed robber as they returned to a stash point piled high with cash stolen from multiple post offices along the coastline.

Just before Christmas 1994, heavily tattooed Jason Mitchell strangled pensioners Arthur and Shirley Wilson, before returning to his father's house and dismembering his body.

After Philip Manning killed his ex-wife dead in a vengeful rage on Christmas day and hospitalised her boyfriend, he led police on a chase across the country.