The Witness

S1 E1: When Myra Hindley's teen brother-in-law, David Smith, alerted the police and brought the Moors Murders to an end, the full story that emerged stunned the whole country. This true crime documentary uses eyewitness accounts to try and understand the killers’ motivations. Letters from prison pen-pals and the insight of a journalist who met the murderers provides a glimpse of their characters.