To me there has never been this link between violent computer games and youth crime.
How many teenage gamers do you know who come home from school, have dinner, play on their XBOX/PC or whatever then head out to storm the streets? Not many right? Me neither.
Most only disconnect when their mum tells them to log off and do their homework or goto bad.
Now unless these youths are incredibly clever and can teleport themselves Hiro Nakamura style away from the screen. How do they find the time to be out committing these crimes when they are supposed to be exposing themselves to a fragfest at home?
Poor education/bad parenting/poverty pull youths into crime. NOT games.