Mark Billingham takes a fresh look at two of Britain’s most infamous serial killers, Ian Brady and Myra Hindley, who murdered five children between 1963 and 1965 in what would become known as the Moors Murders. Sentenced to life imprisonment, Brady and Hindley were masters at staying in the public eye even behind bars. Astonishingly, the pair were allowed to communicate whilst imprisoned and they both also corresponded with journalists and supporters in the outside world. In Once Upon a True Crime, four of Britain's best-selling crime writers retrace the steps of the killers and victims, taking viewers through every twist and turn in the story. With unprecedented access to experts, witnesses and journalists that covered each case, the murders are pieced together and new, untested theories surface in attempt to resolve mysteries that remain.