A child's body in an unmarked grave. A killer waiting to strike again. A young boy's body is found in a meadow beside the River Mersey. No DNA. No witnesses. No clues. It brings back painful memories of the Moors Murderers. After two weeks, the police have made no progress finding the killer. The one thing they do know; he will kill again. It is a race against time - and they are losing. DI Thomas Ridpath has just returned to...