American's don't seem to like learning lessons from history.
The police were invented by the English. The first question you should ask is "why did the British invent police"?
The answer is people really really hated having soldiers on the streets. Armed men frightened them and made them feel unsafe in their villages.
So the clever English decided to create an UNARMED police force and have them police by consent.
The Americans, who like copying everything the British do from our laws to our language, decided they too should have a police force ... and then gave those police guns. What's the point? Just put soldiers on the streets. You completely missed the point of what police are for.
Once you have guns, its not policing by consent. In the UK, we don't have a national police force. We only have local police forces. The principle being, you get policed by people in your community and they can't use force and we all agree to it.
I've no idea what America thinks police are for. Just use soldiers. Your police are indistinguishable from soldiers, but for they can get as fat as fuck and have no medicals to pass. They're just fat soldiers.