If you are the homeowner and your spouse/child invites someone into your home, I believe you have the right to demand that person leave or be removed. That's a far cry from the right to shoot them, particularly when they are unarmed and previously were invited into the home.
I'm just wondering: to all the good-for-him posters, what the bullet had hit his daughter instead? Or, what if he had intentionally beaten up or shot at the daughter? Would you still be saying, good for him! That'll teach her! After all, she is his daughter, presumably he should have even more rights to act on her behavior, as her father. Doesn't she deserve the same punishment as the boyfriend? It was, after all, consensual sex, and the article seems to suggest that the girl was at least as active in plotting to sneak the guy into the house.
Count me among those disgusted by the responses on this thread.
Not necessarily true w/r/t spouse. In most states, each spouse has an equal right to full enjoyment of the property, so each person can invite someone in irrespective of the wishes of the other. Some states may be different. Of course, if you are in a house and one spouse says "stay" while the other says "get out," the course of prudence is to GET OUT!