im with stu on this one - talk to his boss .... if this guy is such a dickhead then it deserves to known to those that employ him.
but this is basically typical of all people ... there's no doing the right thing when it comes to driving on the road. the first thing people do is not admit fault...even if they know damn well that it was TOTALLY their fault!!! they think in their little c*#t brain - "f#@k this guy I know its my fault, im gunna deny it and screw him over, bad luck for him - what have I got to loose?"
if you ever are involved in an accident where someone runs a red light and hits you and you have no witnesses your stuffed - the assholes just gunna say "it was green".
so maybe you get the impression I dont have the greatest respect for these pieces of crap...your only option is to get personal - if you want any justice - f#@k this asshole up by getting him fired / demoted / looses his company car / or just make him look like the POS that he is.
(Just editing the language a bit mate, try use tha astrix and stuff when you can but we all get carried away )