The Final Comedown

The Final Comedown is a 1972 blaxploitation drama film written, produced and directed by Oscar Williams and starring Billy Dee Williams and DUrville Martin. The film is an examination of racism in the United States and depicts a shootout between a radical black nationalist group and the police, with the backstory leading up to the shootout told through flashbacks. The radical group is not identified by name in the film but closely resembles the Black Panther Party.

Source: Wikipedia