The maniac cop is Matt Cordel (Robert Z'dar) a former policeman who has been dead for nearly 10 years. Worried that Cordel might be a liablity to the department, the corrupt New York mayor and police comissioner framed Cordel for murder and sent him to prison where he was killed by the inmates. Now undead, with his former girlfriend Sally Noland (Sheree North) as his co-conspirator, Cordel takes to the streets wearing his old police uniform and killing innocent passerbys to bring down the whole NYPD. In the climatic confrontation, Officer Jack Forrest (Bruce Campbell) tries to stop Cordel who drives off a pier and into the Hudson River where he gets away to continue his killing spree.
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