I'm not saying it was smart or tactically sound, but it worked out. There is a place for luck in the world. My wife's friend is a small woman, maybe 5'4", 105 lbs., but lived in NYC before moving to NOVA,so she is pretty street-smart/aware. She is not a trained shooter, probably fired the gun some after she bought it, but certainly not practiced. She drives her Marine son crazy . . .
My guess is that like most scumbags, he was lazy and moved on to easier prey, and she was simply very lucky.
The Second Amendment IS homeland defense!