A look at the crimes of Andrzej Kunowski, a man so vicious he was nicknamed the Beast after raping and murdering a 12-year-old girl in 1997.

Harold Shipman: A profile of one of the most prolific serial killers in history. With an estimated victim-count of 250, what drove his horrific crimes?

The story of 21-year-old Anthony Arkwright from South Yorkshire, who in 1988 went on a killing spree in which he murdered three people - including his own grandfather.

A profile of serial killer Dale Cregan, who was sentenced to life in prison after the senseless murders of two men and two police officers in 2012.

The story of Hartlepool man Arthur Hutchinson, who achieved notoriety in 1984 when he broke into a Sheffield home and took the lives of three family members in a senseless killing.

Peter Moore, the killer dubbed 'The Man In Black', a murderer who took the lives of four innocent men for fun.

Robert Napper: Known to some as The Plumstead Ripper, he was convicted of two murders, but his victim count is actually estimated to be much higher.

A closer look at the murderer Stephen Seddon, a convicted fraudster who killed his parents in a cold-blooded crime as he tried to get his hands on their £230,000 estate.

A profile of the cold-blooded killer John Sweeney, nicknamed the Canal Killer due to the places he dumped the body parts of his victims.

A profile of the double-killer who branded himself the 'Angel of Mercy', after murdering two of his neighbours in cold blood.