There is literally no legal mechanism for anyone to hold a police officer responsible for anything. This is enshrined in the highest levels of the law and there is literally no way to undo it without a constitutional amendment or a supreme court decision. Citizens also have no influence over either of those mechanisms. Literally nobody has influence over the supreme court.

This isn't a matter of voting. The police are literally outside of the law and above consequence. This was set up by a panel of unelected judges without any possibility of influence by the people.

Do you seriously not undersrsnd how any of this works? This is not a problem that can be fixed with votes. This problem exists outside of the law and out of control of any and all elected officials. A constitutional amendment is the only conceivable way in which the people could overturn this decision.