The truth is that it sounds like a really good outcome - and I think there is a tricky ethical question here. Had someone at the party had a weapon, and shot the criminal, they would have been legally justified - a very clean.
On the other hand, we now know that shooting in face wasn't necessary to defuse the situation. So if someone had shot the criminal, they would have shot someone when that wasn't necessary.
That leads me to believe that a shooting (in that case) was legally justified, but potentially not morally justified. Hard call. [Well, I guess that there are folks for whom legality is morality, but I am not one of them.]
BTW, as far as the story being true - that looks likely. I had a elderly friend who had the same experience. This guy was an old Quaker, and sort of a minor athletic celebrity in NC - I new him as Renfrow Doak, but if you search the internet for "Peanut Doak", you've go the man.
One night, Renfrow was awoken at 3:00 in the morning by someone in his house. He walked out into to the hallway, and found a disheveled young man. Renfrow asked, "Can I help you friend?"
It turned that the guy had mental issues, and (may have) lived in the house in his youth. Renfrow took him downstairs, and made him some breakfast and have him some coffee, and sent him on his way.
Renfrow told this story in Meeting for Worship one Sunday, with a note that his family (children who did not live at home) were very upset at the situation.
Mike