No.
Violent games won't turn people violent. Otherwise, we would have a much higher % of people that play video games and kill because of that.
People nowadays act like this "he murdered, oh wait, he played video games, there you go, it's the game fault" without even trying to investigate further problems in the person's life.
The thing is: it's easy to blaim the video game, when the parents aren't carefully raising their children and teaching them what's wrong and right, what's real and what's fiction. If the parents did this, the kid can play any GTA that he/she won't turn into a serial killer.
It's just up to the parents to take care of their kids. When they don't, instead of blaiming theirselves, they blaim the "myth", because it's easier.