"..against another person when that other person has made an unlawful entry into the dwelling.."
I am not aware of all the details of this case but I am assuming from what I read that the two girls never entered the dwelling. Wouldn't they actually have had to enter the house to act on what this law states?
Not the case. We had someone a few years back beating on the patio door of the house, homeowner killed him, no charges. It turned out that the 'beater' had bad intentions. Still, no good parent is going to condone your kid putting themselves in such harm's way even if your intentions are good.
I don't have time to look it up but I believe it was in the Colorado Springs area.