Here's a good place to start:
http://www.nantucketindependent.com/news/2007/0822/The_Arts/033.html
This is an article I wrote for a local newspaper around a year ago on the topic of media scapegoating and videogames, which is more than a little related to what you seem to be writing about. If you want stuff about Jack, wikipedia is a good place to go.
The Entertainment Consumers Association's website has some useful statistics you can look at:
http://www.theeca.com/
Good luck with your paper, and if there's anything more I can do to help I'd be glad to, the effects of videogames on real life violence and it's perception in the media is something I've been keeping up with for a very long time.
The way I see it is that the main thing contributing to the idea that videogames are destroying civilization is that the generation of people who are making legislation and buying games for thier kids grew up in a time of Frogger and Pac-Man, when videogames were just for kids. Because of this, parents and politicians assume that
all games are made for kids, including the violent ones. While R-rated movies are just as violent as M-rated games, the false impression that violent games are made for and marketed to children is what makes videogames a more frequent target of the media. The fact that isn't getting through with these people is that as videogames continue to exist, they have changed to appeal to a broader audience, and now just like there are movies for kids and movies for adults, there are games for kids and games for adults.