I agree, or for NON US military probably tried in the Hague for war crimes, as well as military court in their own country.
Why the police have become a paramilitary force, they need to de-escalate situations, weapons are a last resort.
Maybe what is needed is a Uniform Code of Military Justice (UCMJ).” but for the police, change a few words around and it should cover the police too.
Can the president issue an executive order for that. ?