Left the safety his house and threatened deadly force to protect his car...I'm not throwing up a high-five on this one.
Would have been best to remain inside, armed, and on the phone with 911. What would have happened if drunks 2 doors down saw their girl at gunpoint in the neighbors yard....
1 Old Man with a Sig 1911 .45 vs. 3 drunkards (one of which was trying to break into a car).
Considering the three probably can't see straight anyways, I'd take the one man with a gun ANY DAY.