it's just because they can.

attempting to gain control of a school from outside. In that situation, an MRAP might be a useful tool, since it would allow police personnel to enter the area with a good degree of safety. Domestic terrorism and that sort of thing. That's almost certainly the justification used for acquiring such armored personnel carriers.

Is such an incident likely? No. Is such a situation possible? Yes. Even a couple of people armed with semi-auto weapons and a good, protected position would be capable of a serious threat to a school. An MRAP would make their protected position worthless in most cases.

MRAPs are pretty much impervious to small arms fire, and can even protect personnel from some IEDs. I can imagine a situation where one being available might save the day and a lot of lives, but I think such a situation is highly unlikely.

I imagine that they're not thinking about using it against students and faculty. That would make no sense at all.

The thing is that they're available from the federal government as surplus equipment. Police forces have them and very large school districts have their own police forces these days.

are protected against small to medium calibre weapons. MRAPs are for IEDs. Are they saying there are IED makers in LA?

Pipe bombs, pressure cooker bombs, propane tank bombs. You hear about them fairly frequently, actually, if you follow the news very much.

Why does the military have an MRAP they can give away willy-nilly to any remotely connected government body?