This new one-off documentary in ITV’s Crime & Punishment season tells the story of detective Steve Fulcher, who by questioning serial killer Christopher Halliwell at a burial site elicited a confession to not just that murder but a second too - and in the process destroyed his own career. Presented by Sir Trevor McDonald and featuring new interviews, rare archive footage and reconstructions, this documentary provides a vivid insight into Halliwell’s horrific crimes through the words of the detective leading the investigation, key local journalists and relatives of the victims.