Eh, been there, done that. If the trooper shows at court, which he probably will since its overtime pay, you will probably lose. He was probably just speeding. I know i was when i got all my tickets lol. Just dont do it again. Actually though, if you fight it and you lose, they could impose the maximum fine, which could be up to around $400 and then court fees too. If he honestly thinks he wasnt speeding, and you think the cars speedometer is off, you can take it to a shop and if its wrong then you can get proof and they will throw the case out. BTW, cops radar is calibrated to their speedometer so they can do that sort of thing.