In 1996 and 1999, two elderly couples died in the small town of Wilmslow, Cheshire. In each case the husband was blamed for turning berserk and killing his wife using a horrifying level of violence. The police failed to make a link between the deaths - despite the similarities. That might have been the end of the matter. But when two coroner's officers began to piece together the evidence, it revealed a pattern which may prove the existence of a sadistic attacker known as 'the silver killer'. Using interviews with dozens of witnesses, David Collins pieces together the clues in an attempt to solve the mystery of what really happened.