A tragic mistake that deserves the penalty she is receiving.
Use of force was necessary when Daunte Wright put that police officer's life in jeopardy. That police officer was in the car, of course, trying to prevent Daunte from driving off. Potter intended on using her taser but used her handgun instead. Many testified that either choice would have been acceptable in that situation.
Daunte Wright shoots people in the head and car jacks people; he was obviously a very dangerous threat. But Daunte Wright didn't give a crap about anyone's life, especially a LEO's life. And Kim Potter responded appropriately and ended the threat.