Very complimentary story on Mr. Wilson in this morning's Austin American-Statesman, with the title saying he was a hero. Apparently, he heard the shots and came running out of his loft apartment.
http://www.statesman.com/
Yes, this is why I carry an AK and a shotgun in my truck, but honestly, if I saw a guy start shooting people I'd have to:
1. Run back to the truck.
2. Unlock it.
3. Open front driver's side door.
4. Hit the "unlock" button.
5. Open the backseat door.
6. Open my long guns case, which has 4 latches on it.
7. Pull out the AK and a mag, load and cock it.
By then, it would probably be over with. This would probably only be worthwhile in some kind of prolonged engagement, and that sort of thing is something I'm going to leave to the cops. Unless it's a riotiing/looting thing, then I NEED my rifle/shottie.
The quickest tool I could respond with would be the Glock on my hip. (And I'm a "she"--people assume I'm a he when I mention hip carry, but I'm not.)
The lesson I'm learning from Mr. Wilson's heroic sacrifice is to quickly scan the BG to see if I think he's wearing body armor and to look for some HARD cover. If he's got body armor on AND I decide to take action, I would have to be close enough to get a good headshot, and I'd much, much rather do that from hard cover, unless I was only a few feet away (in which case a round of 165-grain .45acp Hydrashoks from my Glock 30 would most assuredly do the trick on the back of his head.)