Yeah, even assuming that she knew he was on PCP which seems very plausible, he never even reached inside his car. Shooting him on the grounds that he might have been about to reach in his car where there might be a gun, seems unreasonable.
That said, if I was a judge, I would probably be as lenient as possible, unless there are other circumstances.
I don't think you and the rest understand the point of my comment. The guy turned out to be on PCP, or at least he almost certainly turned out to be on it (I don't know if anybody's seen toxicology reports, whether it can be tested reliably, whatever). PCP makes people do nonsensical, crazy things. It makes them aggressive and paranoid. He could have said or done anything, or she could say he did, and it would be believable. If, for example, he'd said something like "I am going to get my gun and shoot you" before he reached into the car, it puts his actions into a different context.