How to deal with a copper?

shoot him, in the back, when he is off duty. walk up behind him on the street, put the gun a few inches from the base of his scull, pull trigger. shows your hard.

Actually... seeing as he obv had it in mind that he was gonna try it on with your missus, he probably told his missus he was off down the gym/pub/donut shop so noone but your gf, him and you know he was at your house so if you off him you shouldnt crop up as a suspect.