OK, just to clarify a couple of things:
He never entered the Wal-Mart. Three of the people wounded were shot in the parking lot. The other was shot in the parking lot of the law firm (part of a strip-mall type center)across the street.
The perp was shot behind a Toys R Us store. A witness said he was hit twice in the left leg and once apparently in the high upper body, which spun him around before he dropped.
All four are, as of this writing, still in the hospital; no fatalities.
I had not read about the fact that an insurance adjuster was the one wounded outside the law firm. If that is true, it certainly is no reason to make a joke about.
I think the sheriff made the point about the pistol-grip shotgun to make it clear that this was not a "modern sporting rifle" and to emphasize that the bag of ammo he was carrying was still sufficient to have done a lot of damage if law enforcement had not responded so quickly and effectively.
in the meantime, though, where was the "good guy with a gun" that is supposed to help stop these incidents before law enforcement responds in the many, many seconds it supposedly takes them to? Just asking.