This movie is loosely based on the real-life case of Larry Davis, a drug dealer who shot three cops but was acquitted (with William Kunstler as his lawyer) after charging that the police were trying to kill him because they were involved in the drug trade. The Manhattan district attorney, Robert Morgenthau, was also nicknamed "Morgy".
Cameo: ['David Watkin'] sleeping judge in the beginning of the film. This role is probably in jesting reference to Watkin's reputation for sleeping on his own sets between lighting setups.
There is a version of the film which features a more upbeat ending which was only shown to preview audiences. Director Sidney Lumet decided to end the film with a more downbeat ending.