A reminder that on occasion the obvious needs to be reiterated. In this case, the fact that criminals don't obey laws can not be stated often enough. Gun fee zones only provide soft targets to those not inclined to obey the law. They protect no one, and in fact endanger everyone who must go inside them. One can wish away mean old men with evil guns, but magical thinking has little affect on reality.
Another thing that is interesting about this case is that the guy turns out to be nuckin futz as reported in this article in the American Thinker by Selwyn Duke entitled Citizen, Class Warrior, Florida School Board Gun, and Good Humanist. Duke's point in the article is that like a fast car having excellent brakes, so for us having the ability to do great damage that guns represent requires an equally strong moral basis to restrain that usage.
While still a teen, the budding serial killer and cannibal Jeffrey Dahmer said to his parents, "If there's no God, why can't I just make up my own rules?" How is it that a man who lived the stuff of horror films understood the implications of atheism better than "scholars" such as Christopher Hitchens and Richard Dawkins? The answer lies not in superior intellect, but in superior intellectual honesty. Dahmer simply had scraped away the pretense and explored the boundless universe of atheism to its fullest. And this is expressed in an encapsulation of what Dostoevsky's Ivan Karamazov believed: If there is no God, everything is permitted.