Sighting at dawn by motorist NE of Avinger near Black Cypress Creek witnessed in Cass County, Texas

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I drive the same route every evening to work a night shift at a hospital in Atlanta Tx. I drive from near Avinger Tx to Atlanta down Hwy 155. I was running late and got behind a guy towing a boat and he was going well below the speed limit so I took the first opportunity to pass him. He sped up causing me to have to speed up to pass and as soon as I got around him a state trooper came over the hill and I was flying, about 85 mph. I knew I was in the wrong but the hwy takes a right turn and there is a county road to the left (cr 1579). I turned there really quickly before the trooper was able to see me and he flew past the turn off and missed me. I did not really know where I was after I turned right on CR 1580 and it dead ends at Black Cypress Creek. I turned around and started back the way I had come and glanced in the rearview mirror and that is when I saw it cross the road about 75 yards behind me. I have a dash camera on the front but not on the back. I tried to swing it around...