Earlier this year, Devin Moore, now 20, was on trial for the 2003 triple homicide of three Alabama policemen. While in detention for stealing a car, Moore grabbed the pistol of one officer and used it to fatally shoot a total of three of them. The defense mounted a case based on a childhood full of mental and physical abuse, as well as an affinity for violent games. One game in particular, Rockstar Games' Grand Theft Auto III, was singled out, because gamers can steal cars and kill cops in it. Moore had said he was inspired by the PlayStation...