I am assuming the facts that the district attorney points to as probable cause for the attempted murder charge that is now filed against her.  If you want to dream that she had reasons to go back to her car, load a gun, exit the car, shoot the victim, get in the car, leave, and fail to call the police, then you have a very vivid imagination--likely on par with Mr. Quack(enbush).  There is a difference between facts in the case and facts you choose not to accept.