But why bother?
The police will conclude that there was nothing that could have been done that wasn't.
The usual ghoulish fascination will erupt through the daily fire-and-murder-news cycle for a day or so and be off the heavy rotation by the week's end.
It's really that simple. Really.
But autoloading firearms are also just plain fuckin' fun to shoot, and we love our shooting fun, and we, We the People, are perfectly content to let others die or live with their wounds so that we may have our fun.
But, hell, y'all know that.
In fact, we discussed the hell out of it back in the spring when another nutter went and shot up a theatre in Colorado.
What else is new?
Couple of quick observations:
First, we really live in an extraordinarily safe time and place. As little as three hundred, five hundred, a thousand years ago we'd be shocked if most of the people we knew weren't dead of the Plague, or raped, butchered, then raped again in the latest fill-in-the-blank invasion/civil war/pogrom. I think that's why these random mad minutes make the news; they shatter the illusion we live in that our lives and our homes are so perfectly safe. They're a little teensy one-nutter Mongol Horde thundering in over the horizon to rape and pillage.
Then we really need to start accepting that so long as we're going to be okay with widespread private firearms that these occasional nutter-shootings are just going to happen. They are. And nothing short of a violent change in the way American society and public law works will change that.
And the final, simple, reality is that humans kill each other, always have and probably always will. Homo homini lupus; Man is a wolf to Man. This little fracas is just another in the unbroken line that starts back with the first australopithecus that went doolally with a camel thighbone and brained some of the gang around the waterhole and will continue on until the first flare of the solar nova bakes all humanity to a delicate crunch.
Update 1, 12/12 p.m.: Here's some more detail on the idiot who did the shooting. He apparently lifted the Armalite from a pal, and for the record here's the part that gets me: "...the rifle jammed during the 22-year-old's attack, but he managed to get it working again."
So this numbnuts steals what we'll have to assume is a weapon he's completely unfamiliar with, manages to get it to double feed (or either fail to feed or fail to eject, all fairly typical AR-15-type malfunctions) while he's capping sweet white-haired grannies and grampies, and then manages to do some sort of immediate action and gets it working again.
This is the thing about firearms; they're fucking easy. They're simple to work, especially modern military-style firearms which are designed to be used by deadhead draftees and Somali teenagers. They're quick to debug if they malfunction. And they're easy to use; just point at the nearest toddler and shoot.
It takes some strength, some determination, and some damn deadly difficult-to-learn homicide skills to kill someone with a nunchuck. Or a pickaxe. Or a bread knife.
But an AR-15?
Easy-peasy lemon squeezy, as the little ponies say.
Update 2: Charlie Pierce, as usual, has more, and better, to say.