Huh. Around here most of the guns are out in the summer cottages and whatnot, seeing as they're hunting rifles and shotguns. Occasionally some wit out in the boonies goes nuts, starts shooting around, maybe kills his family (although those usually then shoot themselves), that sort of thing. The cops' SOP is to siege the cot until the guy either starts listening to sense and turns himself in, or they deem him to be sufficiently dangerous to require the attentions of a SWAT-equivalent assault team or sniper. In which case he heads to hospital first and gets interrogated and charged later.

And, hey, what do you know ? Incidents of police brutality and suchlike are something like zero, and the profession consistently enjoys quite high respect and regard in polls.

CR, maybe you just should have a society and law enforcement system that aren't screwed up six ways to Sunday ? Might be more helpful for this sort of thing than everybody being armed to the teeth...