Legal posted speed 75 mph. 92 Cadillac on cruise control reached group of slower moving cars and started passing at top of hill double divided highway and speedomete hit 80 just as I saw the trooper car 1000 yards down the road. Pulled in around traffic then was pulled over by highway patro officer. Stated I was clocked at 91 mph. Car speedometer only goes to 85 plus had just checked it out minutes earlier using watch and mileage markers did 1 mile in 45 seconds and previously speedomete had checked out in comparison to the signs on the road showing your moving speed. Officer said he’d reduce to 86 mph so fine was only $75 instead of $150 but know I did not go over 80. Why do they lie?