St. Landry Parish, Louisiana Speed Traps

I could not believe it going down the road with my wife in a new truck I bought in Florida heading home to Las Vegas. The police car going south behind a little truck pass by me going the other direction. 3 min later he pulls me over and says I was speeding. Clock me going 59 in a 55 which I thought the road was 60 mph. Then here’s the good part, Then he says “after you went by me I could see you speed back up to 67 mph.” So he wrote me the ticket for 67 which was 8 miles an hour than I was going. Just enough for them to get you for 3 miles over the cheaper fine. I know for a fact that I was only doing 58 or 59. Yes, I was going over the posted speed limit but I also was not a threat of hurting my self or anyone else on that stretch of road at 9 am in the morning and good weather conditions. 3 mph is equivalent to speedo error in my book?? So now home paying a $195.50 dollar fine and typing a letter hoping not to have this on my record. All I can say is don’t do any business there and keep off hwy 49 anywhere by Opelousas. Has anyone ever heard of a cop car shooting radar forward and backwards at the same time? I have’nt.