Actually it should have been tempered. Commerical glass is tempered and it's very tough. It also should have been tied into the wall studs. (or what passes for them in a commerical building)
I also wonder if they poor tyke didn't do somethign to cause this to happen.
Not that it makes what happened okay, because the mirror should have been mounted more securely to begin with.
If little boys can knock it off the wall, it was only a matter of time anyway.
Are you people reading further down in the thread to get the whole story?