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Kham... Did you make an illegal pass? Were you driving like an ass? If yes to either pay the fine and STFU.
I know it might not seem "fair" that the guy in the truck "Ratted you out" but if you do the crime, Pay the fine!
Now on the other hand... If you were riding legally and just passed this dude because he was going really slow and it was VERY safe to pass him and you did so in a safe manner... then fight it. Tell the court such and hopefully you have a good record to show the court you are not a squid...
You coming up to the track anytime soon?