Innocent people are being brutally murdered on the streets of New York by a uniformed police officer. As the death toll rises and City Hall attempts a cover-up, Frank McCrae heads the investigation. A young cop, Jack Forrest, finds himself under arrest as the chief suspect, having been the victim of a set-up by the real killer and a mysterious woman phone-caller. Forrest, his girlfriend Theresa, and McCrae set out to solve the puzzle before the Maniac Cop can strike again. —IMDb
William Lustig (born February 1, 1955 in in The Bronx, New York), also known as Bill Lustig, is an American film director and producer who has worked primarily in the horror film genre.
As a film director, Lustig is best known for his films Maniac, Vigilante, Uncle Sam, and the Maniac Cop series. Lustig has also worked as an actor playing small roles in his own films as well as in films by Sam Raimi, most notably as a fake shemp in Army of Darkness and a dockworker in Darkman. As of 2009, Lustig is the CEO of Blue Underground; an entertainment company specializing in the release of obscure films and exploitation films on DVD. —wikipedia