Why would two young boys abduct, torture and kill a toddler? What makes a teenage girl plot with her classmates to kill her own father? Society regards children as harmless - but for some the age of innocence is shortlived, messy and ultimately murderous.Mary Bell, Robert Thompson and Jon Venables are infamous for their crimes against other children, but many of the less familiar studies here are equally as shocking. Thirteen murderers - the youngest only ten - used fire, poison, bullets and strangulation on victims from infants to pensioners. In a comprehensive study of juvenile homicide, Carol Anne Davis offers new psychological insights and a hard-hitting look at the role of society in an area too shocking to ignore.