The document discusses how social groups were represented in a media product. The killer was represented stereotypically through dark clothing and lighting that hid their face and created mystery. The detective was represented differently, wearing plain clothes at first to be undercover but in a well-lit office setting that clearly showed him as an authority figure once his role was revealed. Overall, the document evaluates how the characters of the killer and detective were stereotypically portrayed through visual cues like clothing, lighting, and camera angles to fit expectations.