Scotsman Douglas Skelton shares his knowledge on the notorious Ice Cream Wars, where he revisits the gritty scenes of 1980s Glasgow, where conflicts and corruption strained the city’s East End as rival criminal organisations competed to sell drugs and stolen goods from ice cream vans. Four of Britain’s best-known crime writers turn detective in a brand-new series Once Upon a True Crime. The show investigates the real-life murders that inspired some of the acclaimed authors’ most famous novels. In each episode, the 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.