Subject: Re: I saw this coming
If there's going to be a prosecution, it would be grounded on a determination that an objectively reasonable officer would have determined that deadly force was not necessary to prevent great bodily harm to the officer (or another).

The argument is that a reasonable officer in that scenario would have known that the woman was simply driving away and not trying to run him (or anyone else) over, and neither he nor anyone else would have been injured if she had been allowed to drive away unimpeded. Whether you believe that argument or not, that would be what the prosecution would be trying to establish.

William Kirk (whose channel you probably would like because he geeks out on the law and legal findings - his words) brought that up: He observes that if this had been some officer who was 30 yards away taking the shot that officer might have a problem. It gets considerably murkier when the officer in question is a few inches away.