http://www.wisn.com/news/police-tying-together-several-recent-robberies-carjackings/26909026#!bf3Y5X
Cliff Notes: Woman is stopped by a gang of teenagers. They demand her car keys. They get in a struggle while one of the boys tells another to get a gun. She manages to unzip her gym bag and retrieve her own firearm, then shoots one of the attackers. The others flee.
Self-defense is a civil right.