Was she carrying?
One survivor of the Monday afternoon shootings in Brooklyn was an off-duty officer who was getting her hair done. http://apnews.myway.com/article/20081028/D9436F4G0.html
From what I've heard they are only sheepdogs when they are on duty, if you knew when the fight was coming then you could be prepared, but since you don't know you have to be prepared all the time. Weather you are an officer off duty or a ccw'er anytime you leave your gun at home, as you leave just look around you & go "baa, baa"