In 1968 James Earl Ray was arrested at Heathrow Airport. Can you imagine how daft it would have been to try him over here for the assassination of Martin Luther King? You should be tried in the country where the alleged crime is committed. In both this and the McKinnon case, the alleged crime was committed in the UK. Furthermore, if it isn't a crime in the UK to do what this lad did in the UK, then that's hard luck on anywhere where it is a crime, really. If what he did is a crime here, then he gets tried here, if the CPS think it is worth it.