The news article shows the importance of shot placement - shot placement - shot placement! Any questions?
In addition to shot placement, it also shows that not every maniac who forces their way into your home will run away screaming at the sight of an armed homeowner. He/they might not care about your guns, dogs or alarm systems, and they know what its like to be in jail (as this scumbag apparently was). There is no deterrant for this type.
All I am saying is that when people go to "clear house" or to retreive a dog, THIS GUY might be the one in the kitchen and maybe he has friends. MAYBE they are armed as well. Why leave a RELATIVELY secure area with your wife/family to find out? It ain't always the lowly local pot-head looking to get your TV, and it doesn't have to be a Delta-Force team either to ruin your day (or life).