Street Smart (1987)

Jonathan Fisher (Christopher Reeve) is a reporter struggling to keep his job at a magazine. Assigned to write a real-life prostitution exposé, he fails to gain information from his subjects and decides to make up his own story about a pimp. The piece revives his career, but his fictional character turns out to be strangely similar to Fast Black (Morgan Freeman), an actual pimp, who is outraged and demands that Jonathan spill his sources. When the police get involved, matters get even uglier.