Book excerpt: Jonathan Paul goes behind the sensationalist headlines of 'child killers' to investigate why these crimes happen. He examines child homicide in today's violent, confusing world and contextualises it against the cruel unforgiving retribution of yesterday. Children are increasingly experimenting with drugs and committing offences, but there are those who commit the worst possible crimes: to end another person's life before their own could properly have begun. The cases are shocking but sometimes the path towards them is even more so. This is a fascinating exploration of disturbing events aimed at discovering what happens when childhood is trodden underfoot, and when and why kids kill.