Meh. Sure, I'll bite for the OP. I'm guessing he/she is looking to prove the hypothesis that a biased audience will support views in their favor. I'll do it, but at least I'll make it a little more high brow than 'those people are morons!', for the sake of the Escapist.
Stepping away from the interesting correlations between two unrelated points as pointed out by Exhuminator, which is striking and can easily refute the arguments that videogames cause violence...but then one can make just as reasonable argument that cold weather causes murders if you read off the statistics of Austin, Texas and Chicago, Illinois. Not to minimize Exhuminator's point though.
Violence caused by media is something that has been an ongoing theme since the invention of widespread literacy and the printed word. Seventy years ago Starship Troopers was billed as being the most violent book ever written and people were aghast at it. Thirty years ago Red Dawn (the original) was condemned as being the most violent film ever made. Over three centuries ago the push to make Opera accessible to the masses was ostracized as being horribly indecent. Society has attacked and crucified every form of media as it has emerged and pointed to that as being the source of society's ills and the definitive cause of a problem. Videogames are merely the latest scapegoat in a long line that holds among it's distinguished members such disturbing forms of art as Realistic art, photography, literature, opera, multi-tonal music, Rap, Rock and Roll, television, Cartoons, Comic Books and countless others.
Each one was held up as being the cause of society's downfall, each one was viciously attacked by the powers at be, and each one is commonplace in our society.
Videogames are merely the the latest one, and like all the others it's evil is in the eye of the beholder rather than it's merit or flaw. Show me a sane person whose violence can be linked to video games and there might be merit in that discussion. But for the overwhelming majority of 'violence caused by videogames' the cause rests in the damaged mind of the beholder, and not in the subject of his obsession.