I think you're all taking Axman the wrong way, maybe not in this particular incident it was manageable but It does seem that most of these gun nut shooting end up with the shooter dead. From what i know on the subject (and i dont really know much) its as if the regular police are the ones who're taking these kinda guys down, like Magus said they're scared and they look at it in the kill or be killed view. Maybe they're the only available people at the time, and they have to work fast, but it still doesn't mean that it couldn't be handled better. Ideally better trained units should be handling such incidents. The best outcome after-all, once the incident starts is no more casualties, including the perp.
To me, it seems these things would be much less frequent if the gunners knew it was possible that they could be captured and imprisoned, with no way of self inflicted harm available. They clearly take these killing jaunts as a win/win situation, yet the one thing that's punishment for them is almost never done, with this they have nothing to be afraid of. When the next genocidal idiot thinks he's got a way to have some kinda impact on the world before he dies it'd be nice if he had to think twice because of the possibility of being forced to live another 20 sedated years.
Saying you get satisfaction from watching anyone die is sadistic in my opinion, I dont think its as bad as killing innocent people, but It's not a progressive way of thinking.