Over a period of about twenty years Fred and Rose West abducted, tortured, raped and murdered an unknown number of girls, many of whom lay buried in the garden until the police dug them up. What motivated West to commit such terrible crimes? Was he born evil or did his upbringing make him this way? Did he do it for sexual kicks? Or, as some allege, did he supply the sacrificial victims to a black magic coven?

The world’s most prolific killer, Shipman is estimated to have killed 275 people, but the actual figure will never be known. The 57-year-old GP was given 15 life sentences to run concurrently for the murders, and four years for forging a will, but hung himself in his cell after he was sentenced. He always denied his crimes. When the police began investigating Dr Harold Shipman in September 1998 they struggled to understand him. How could a GP who was trusted and respected by more than 3,000 patients also be a killer who struck time after time with no obvious motive? The coroner speculated that ‘the only valid possible explanation for it is that he simply enjoyed viewing the process of dying and enjoyed the feeling of control over life and death, literally over life and death …’