I'll be brief. I was traveling on a three lane interstate in the middle lane. I was passed on the left by a car going significantly faster than I was. I had my cruise set around 68 or 69 mph. A couple of hundred yards after that car passed me I swung into the left lane to pass a semi. As I did this I came up on the same fast car slamming on his brakes. He slowed to almost exactly my speed. I saw a State Trooper ahead. Long story short; I received a ticket for going 83 in a 65. The tropper admitted he didn't actually clock me, but the guy in front of me. He said "I clocked him at 86 and you were right on him." I need to know what to do to fight this. I was only going 68! Please help.