The police are the public and the public are the police; the police being only members of the public who are paid to give full time attention to duties which are incumbent on every citizen in the interests of community welfare and existence.
There was a big drive when I was at art school to make you aware of the economy of meaning - after all, this was still during the tail end of minimalism. Being responsible for everything you put in your picture, and being able to defend it. Keeping everything clear around you so you know what is operating. To open the wound and keep it clean.