HBO has greenlit cult classic film franchise from Nicolas Winding Refn and John Hyams. It will be set in Los Angeles, Maniac Cop is told through a kaleidoscope of characters, from cop to common criminal. A killer in uniform has uncaged mayhem upon the streets. Paranoia leads to social disorder as a city wrestles with the mystery of the exterminator in blue. Maniac cop is based on the 1988 American slasher film directed by William Lustig, written by Larry Cohen.