There is a video on his Facebook of him & a friend playing GTA4. Get ready for Video Games to be blamed!
Man that sucks for this guy but you would have to be stupid to think video games aren't a factor, vunerable people with psychotic problems shooting people in the face in games from an early age has to do something. Kid's playing Call of Duty with levels like "No Russian" with some very realistic graphics, when I was a kid you didn't have the realism you have to today in games.
Don't be dense, realistic graphics do not make something real. When you are carrying a controller it is a pretty obvious that the things happening on screen are not real. Don't try to place the blame on video games, or for that matter any type of media.