The self-hating black police officer was based on a cop whom John Singleton witnessed as a kid. Singleton felt it was critical to show this officer to show how racist black police could be towards black people.
Ice Cube was John Singleton's first choice for Doughboy, he approached him at a rap music concert a couple of times, and Cube was reluctant to audition via a screen test, conducted by Singleton himself.
A pickpocket in this film, who tries to rob Doughboy's crew and gets beat up, wears a T-shirt reading "We Want Eazy". This is a reference to Eazy-E, Ice Cube's former N.W.A. band mate, with whom he was feuding at the time of the movie.
In order to maintain a sense of realism (i.e. shots firing unexpectedly), Singleton never gave the actors cues as to when the shots would be fired. As such, their reactions are real.
John Singleton's Oscar nomination for Best Director at the age of 24 makes him the youngest director to ever receive such an accolade, beating Orson Welles by a good 2 years.
At the beginning of the movie the voice of a little boy says, "They shot my brother". This is the voice of Kenneth A. Brown, who plays Little Chris as well in the younger years of Tre's life.
In the scene where Furious (Laurence Fishburne) and his son (Cuba Gooding Jr.) are sitting on the rocks having a father-to-son chat, Furious mentions fighting as a young soldier in Vietnam. Laurence Fishburne starred in Apocalypse Now as a young soldier in Vietnam.
Columbia wanted to make the picture, but at first wanted someone else to direct it. Singleton believed only he could do it saying, "They asked me if I would consider anybody else directing it?" Singleton replied, "Hell, no, I'm not gonna let somebody from Idaho or Encino direct a movie about living in south-central Los Angeles. They can't come in here and cast it and go through the rewrites and know exactly what aesthetics are unique to this film."