Fox News has allowed Jack Thompson, the barred irrational Christian conservative anti-gaming and pro-gun lawyer from the US, to criticise the video gaming industry for what has happened in the US today. As a side note, nothing has been released to the media that indicates the shooter(s) was a gamer. We don't even know his or her age or name.
And even if he does, so what? Nothing will be proven except that a single killer was motivated by something, and even then it would not link an entire medium with the ability to influence people's decision. It is like Columbine all over again when Marilyn Manson got blamed. I bought Antichrist Superstar when it was released a decade ago (still listening to it) and play shooters on my PC and consoles. I have yet to kill anyone.
Only a sick tosser would use the death of others to further their own agenda.