I don't know if people are aware of this, but the UK has had a spate of murders lately, where the killer and the victim were both children. There have also been a spate of killings where the victim was an adult and the killer a child, or group of children. Usually these have been teenagers, often gang related, sometimes not.
Yesterday in Liverpool a boy of 11 was gunned down as he walked home from playing football, shot three times. His killer, a teenage boy riding a BMX bike.
http://news.bbc.co.uk/1/hi/england/m...de/6959562.stm