Generally all my experiences with the police (ive had loads!) have ended with me getting away alright! And these are traffic offenses, dangerous driving (motorbike), speeding, wheelies n plenty more. All I've found you have to never admit you have done anything! "You were doing 55 in a 30 zone, why? "Oh, I was just doing what I thought was safe, its 3am, had my eyes glued on the road too much to look at the speedo, and when I saw a car in my mirror right up my arse I just wanted to shake it! Had no idea you were the police" Somehow that got me off nicely haha! Just be understanding, if they arnt seen doing their job, they get in the shit, just like us! So just talk nice and understanding, treat them like any other person, agree with them, and get your arse out of there without causing trouble!!