I just watched the video at WTOP and they popped off at least five rounds when she got away from them the second time. There were plenty of other people around so they plainly weren’t too concerned about stray rounds.
http://liveblog.wtop.com/Event/Shots_at_Capitol_Hill
By looking at the beginning of this video when she was about to back the car up and hit the police car, I could see that there was NO passenger. Check it out. Post #798