The only real way to deal with this would be to police the police in a realistic manner. Bodycam and location data of their every move would need to be available for that. Currently, police can simply turn these off.
Yes, there are scumbags in both ordinary citizens and in police but one of these groups of scumbags already gets "policed". (Disclaimer: I do think that this idea is not the right way to deal with this problem.)
some police may act as if they're above the law, but that's projection, not foundational.
edit: interesting, seems to have hit a tribal trigger of some sort, but can't tell if it's the "police bad" or "police good" contingents getting their feathers ruffled.
we all have the propensity to abuse situations and privileges, so police aren't special in that regard. the problem is that we narrowly attribute this universal human quality to just police, blinded by context, because that fits a preconceived narrative and surreptitiously makes each of us feel a little better about ourselves. this happens subconsciously and is a form of the fundamental attribution error we make so often.
that's not to absolve the police of grievances, since they do have extraordinary powers and as a result their misbehaviors have greater impact. certainly we should hold them to a higher standard. but police aren't more corrupt than average (they aren't lesser human beings, as implied).