I'm from Utah and last week, I got pulled over for supposedly going 87 in a 70. I KNOW this was not my speed, while I know I was speeding (80-81 mph) I was definitely not going 87. Prior to being pulled over there was a black, lifted GMC Sierra coming up from behind me at a ridiculous speed (at what i'm guessing to be 87 mph), in order to get out of the way of the truck I sped up from ~75 mph to 80-82 mph to get ahead of the car next to me and switch lanes. At the same time a highway patrolman was merging onto the freeway from my right, he looked over, made eye contact with me, then proceeded to pull me over. The cop came up and told me I was going 87, I said that "I know I was going fast, but I was not going 87." He returned to his car and came back with the ticket - for 17 over.. After signing it, I asked the cop if he had saw the black GMC Sierra speeding ahead of me, and he replied with "Yes, but I could only choose one."
Is it possible for the cop to have registered and mistaken the truck's speed for my own? And is this worth explaining to a judge and seeing if they will lower the ticket? It was for my safety that I sped up to avoid being rear ended by the truck.

