Mastrogiacomo has a great point. Ask how many cops like responding to domestic violence situations? The apparent victim sometimes comes to the aid of her assailant/partner. CCW holders are not trained LEO's and according to Florida's laws, use of force is only justified in the prevention of a forcible felony where loss of life or severe bodily harm is imminent without intervention (Paraphrasing, not the exact law). With that said, I would call out from a distance and be ready to draw if necessary. The BG my be raping the victim at gun point and you had better be able to respond quickly. I would save the 911 call for after I have asessed the situation.
The ATF should be a convenience store instead of a government agency!