Visible crew/equipment: When Sofia and Brass arrive at the interrogation room where Dwight is, you can see a red tape mark on the floor outside the door which Louise Lombard promptly glances down at and makes a point of placing her left foot on it. This has nothing to do with the fact that the "Hard Crime" film crew are following them because they're only observing.
Visible crew/equipment: The prostitutes take turns telling their stories to Captain Brass in their dressing room. But as the long-haired brunette lady tells her story from a distance, you can see a cameraman in the mirror behind her waiting for his turn to film. When she is shown close up, you can see him closer in the mirror, filming.