Shooting crazy people is not the vanguard of public safety, its euthanasia. I prefer that the police exercise non-lethal force when possible, and one of my benchmarks for whether their use of force is OK is to ask how they would treat me for doing the same thing they just did. In this case, I would be getting charged with murder for cornering a hit and run driver and then shooting them 50-60 times.
Oh. So how many people do you believe it would be acceptable for her to hurt or kill in order to meet your criteria? A number, please. Obviously she wasn’t going to take out everyone, and arguments deploying reductio ad absurdum hardly add to the debate.