Despite finally getting his burial with honors at the end of Maniac Cop 2, Matt Cordell (Robert Z’Dar) returns for one last outing.  Raised from the dead by a voodoo houngan (Julius Harris), Cordell invades a hospital to seek vengeance for a comatose policewoman named Katie Sullivan (Gretchen Baker).  In a coma due to the wounds she received while thwarting a convenience store robbery, Katie is being framed by unscrupulous reporters and attorneys who claim that Katie was a bad cop who killed a clerk in cold blood.  Cordell sees Katie as being a fellow victim of anti-cop bias and he is not going to let anyone treat her with disrespect, which is something that two doctors (Robert Forster and Doug Savant) are unfortunate enough to discover.  Sean McKinney (Robert Davi) and Dr. Susan Lowery (Caitlin Dulany) try to figure out how to bring peace to the souls of both Cordell and Katie.

As opposed to the first two films, Maniac Cop III had a troubled production.  Lustig and screenwriter Larry Cohen wanted to set the film in a Harlem hospital and bring in an African-American detective to investigate Cordell’s activities.  The film’s Japanese producers insisted that Robert Davi return as the lead, even though the script’s lead character had little in common with the way Sean McKinney was portrayed in Maniac Cop 2.  Larry Cohen then refused to do any rewrites on the script unless he was paid more.  William Lustig filmed what he could and ended up with a 51-minute movie.  Extra scenes were directed by one of the film’s producers and the film was also padded out with outtakes from Maniac Cop 2.

The film is disjointed and there’s too much time devoted to Jackie Earle Haley playing a character who has much in common Leo Rossi’s serial killer from the second film.  (Haley’s performance is fine but the character feels superfluous).  But the movie’s hospital setting leads to some interesting kill scenes and Z’Dar and Davi both give good performances as two different types of maniac cops.  The supporting cast is full of good character actors like Haley, Forster, Savant, Julius Harris, Bobby Di Cicco, and Paul Gleason.  Despite the film’s flaws, Maniac Cop III is a solid ending for the trilogy.