Swindon taxi driver Christopher Halliwell killed two women: Sian O’Callaghan and Becky Godden-Edwards. But he nearly got away with Becky’s murder because of the way the lead officer, Detective Supt Steve Fulcher, obtained the confession.

ITV made a drama about the case. In this film, reporter Robert Murphy explores the facts behind the drama and showed how it played out on news bulletins