I will add this so as not to seem biased: in the time between me submitting this and the story appearing on the site, a victim of the shooting has given a response and Mustaine has backtracked from the exact wording of his comments. However:
"We really need to investigate this," the heavy metal singer said. "I love our country and my whole thing with this is that I think we should just look into it… I just think that we deserve to know the truth – that's it.
"I'm a patriot. I've always been controversial. I'm a political songwriter. And this wasn't done to hurt any our my fellow countrymen. I think that it's something that we really, really need to look into."
He went on to allege that there are "criminal rogues" in the US government who do not act in the public's best interest.