The vicious murderer of a Manchester sweetshop owner was caught thanks to a remarkable piece of ground-breaking forensic science. For a savage attack that resulted in the death of a 58-year-old shop owner for a meagre £6, James Smith arrogantly told police, "I won't hang".

The investigation became known as the 'Jigsaw Murder' , owing to the revolutionary CSI (Crime Scene Investigation) that led to the killer's arrest. On a Friday afternoon in May 1962 , James Smith, a 26-year-old rubber moulder from Beswick , carried out a brutal attack in a sweet and tobacco shop on Hulme Hall Lane, Miles Platting .

Nobody is sure whether Smith spoke with Sarah Cross, the shop's owner, but whatever passed between them, minutes later, she was dead. Smith battered his victim around the skull with

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