The law needs to be if they don’t have their bodycam on and operating, they aren’t a cop at that moment. Anything they do without it recording is their actions as an individual citizen and therefore not protected as the actions of a law enforcement official. Of course there is a litany of other reforms which need to happen as well, but I feel like this would be a simple but major one.
Poor Man’s Poison has put out a few good political/social songs recently, I’m not sure if I would call them “protest” but still fairly close
Feed The Machine
Give And Take