This might be the movie I was asking myself about what the title of it could have been. Here's something that will make the guys click it:
Demon Cop is no Lord Of The Rings or Terminator 2, but it does make for some compelling viewing, for the simple fact you have no idea whats going on, it looks like it was made by a blind man, and not once in the film is the Demon actually a cop!
Is there a scene in it where the hero is trying to escape from a house and a blond woman (probably dressed as a nurse in a wheel chair) chases them and bends into the car and you can see her tits? Actually that's the only thing I remember besides some silly dialog and shooting.