They exist to create problems, not solve them. They don't want justice. They want power while producing nothing of value. Also, the nation wide agenda of leftists is to provide the narrative that local police are the problem, and that only a nationalized law enforcement institution is the answer. Local cops get to be public examples of "right winger racists with guns" while the police union managing and skimming and laundering the police benefit packages seized from taxpayers is fully complicit and helping to fund the political campaigns.