On Satanism, Swords and Slipknot

The country has been going on the last two days about an 18 year old boy who killed another boy at school with a sword, and then attacked two gardeners. The original reports described the boy as being dressed in a balaclava, with his face smeared in black paint. Details emerged later in the day about how the boy blamed Satan for his actions, and was dressed like the drummer in a band called Slipknot. He was also high on drugs at the time.