I feel for you matey, jmho but the only place a "few slaps" will get you is in the nick. 
The way I see it, you have two choices with c**ts like this, you either have to take him for a ride and see to it that he dribbles for the rest of his life or you drive plod nuts making reports that you have seen him entering his house with a gun, he has threatened to kill you, he has come at you with a knife......different story every week till the c**t is so sick of having his door kicked in he leaves off. 
  
Drive him mad and drive plod mad, they will sort it sooner or later