I had no bloody clue what you meant about "people not running away fast enough"

Duty to retreat == "you will be aconvicted if you don't run away from your attacker fast enough"

When you face a credible, criminal, imminent threat of death or grievous bodily harm, whatever action you take to survive is acceptable. Nobody should be able to argue "you didn't run away fast enough" and convict you for trying to survive. The person with a "duty to retreat" is the violent criminal attacker, not their victim. Placing that duty on the imperiled person violates that person's civil rights and human rights.

The process of justice should be secondary to the safety of citizenry

Correct. What you fail to understand is that the officer is a member of the citizenry. The process of justice is, indeed, secondary to the lives of those imperiled by an unlawful use of lethal force.

You keep getting hung up on the alleged shoplifting. The shoplifting is irrelevant to the shooting. She was not shot because she was shoplifting.

Your focus should be on the fact that she drove her car into a person, without caring about the harm she could cause in doing so. Deliberately driving a car into a person is assault and battery with a deadly weapon. She was shot to stop the immediate danger she posed to her intended victim. That is not a "single slip up". That is not justifiable simply because she is "scared".

You keep talking about how the officer put himself in harm's way. That is victim blaming. You wouldn't say that a woman puts herself in harms way by wearing a short skirt. If she is raped, criminal liability rests solely on the rapist, no matter how "recklessly" she wore her skirt. Likewise, full criminal liability for deliberately driving into a pedestrian falls on the driver, not the pedestrian.

Nothing ever gets better and more people will die for stupid reasons.

Agreed. What we need, desperately, is for our laws governing the use of force to be taught to everyone and not just to police, lawyers, judges, and concealed carriers. Cops keep "getting away" with killing people because they are following the letter of the law. They are "getting away with it" because the government trains them - and only them - on the law.

Every justifiable homicide at police hands is an indictment of our government providing officers with this training, while withholding it from the public at large. We should be demanding the same training in our schools, and not just the police academy.