Killer GP Harold Shipman is thought to have murdered around 250 patients, mostly elderly women, by injecting them with lethal doses of diamorphine. Shipman, one of the world’s most prolific serial killers, was sentenced to life imprisonment in January 2000 - but he evaded justice by hanging himself in his cell at Wakefield Wakefifield Prison in January 2004. Another killer, paedophile Roy Whiting, who murdered seven-year-old Sarah Payne in 2000, was later put in the same cell in the prison, nicknamed Monster Mansion. Whiting claimed the cell was haunted by Shipman, leaving him too scared to go to sleep. Whiting demanded to be moved after being left terrifified terrified by eerie noises and ghostly goings-on.