In April 2016, the unassuming town of Spalding in Lincolnshire earned an unwelcome place in true crime history when it turned out to be the home of Britain's youngest ever double killers. The victims were a forty-nine year-old mother named Elizabeth Edwards and her thirteen year-old daughter Katie. They were stabbed in the throat and then suffocated with pillows as they lay in their beds at night. These awful murders were unspeakably brutal and harrowing. The mastermind of the murders was Kim Edwards. Kim was the middle daughter of Elizabeth and the older sister of Katie. She had not acted...