Concluding the investigation into the 1994 murder of six-year-old Rikki Neave. Fifteen years after Rikki's mother was cleared of his murder following a flawed police investigation, a team of dedicated officers from the Major Crime Unit of Cambridgeshire police were authorised to begin a fresh investigation. Analysis of the evidence put a new suspect, James Watson, who was 13 at the time of the killing, together with Rikki on the day of his disappearance. But despite a forensic breakthrough, Watson presented the officers with a conundrum that made it difficult to prove the case against him. (thetvdb.com)