It's the milkman who notices something is wrong at Nan Lawrence's house. The old lady always leaves her empties on the step.Peeking through the curtains, he sees Nan's body on the floor. There's blood spatter all over the tapestry she was embroidering.DI Joanna Piercy is rushed off her feet investigating a spate of robberies. A gang of youths is targeting elderly women - and their attacks are becoming increasingly violent. But have they resorted...