Police can shoot people right between the eyes.
It has to justifed. If its not justified then it could be prosecuted as a crime.
So, proper application of force can be "overseen" by civil and criminal courts in the USA. But there is no such criminal statute that says "Police will never shoot people between the eyes."
City, county, state and federal governments who need insuance, use insurance attorney guidelines, then interpreted by local government attorneys, to set this use of force policies.
Lets dissect the use of chokes. There has never been a US criminal law that outlaws police using chokes. Instead, there has been a wave - a sweeping movement - to restrict it by agency policy due to the risk of law suits.
The risk of law suits.
Hock