There is not enough information provided to determine who, if anyone is at fault here.
The Mom was at least 5 feet away according to the article. If she'd had the 3 yr old beside her.........
And that makes it more of a heartbreak.
Your right, the mother is worse than Andrea Yates and should be drawn and quartered. 5 feet away is a whole 58 inches and that's too damn much to let a tike out of reach. Do you wrap your kids in bubble tape every time you leave the house? Ah..another contrarian Freeper wanting to argue the world's flat. Your assertion is idiotic, I'd drop it.
And if you paid attention to my comment, that you quoted, had the positions been reversed the mirror could just as well fallen on mom. Or if they were all together, on all of them.
As I said - there is not enough information to point fingers of blame at anyone here.