Yes, that’s the power that needs to be stripped away.

The government should not have the power to kill its own citizens, not under any circumstances. This includes police. They should face actual, external investigation for every bullet fired, and if they kill, that’s it. They’re not a cop anymore. If the death was justified (a big ask) they can get free retraining and a small stipend for a few years. If not, they get a full trial for murder.

All deaths in prison should also get a full investigation, with murder charges possible.