This is ostensibly a story about small-town corruption. It is actually a story about American drivers and their widespread inability to adhere to a speed limit.
https://www.propublica.org/article/fenton-louisiana-brought-in-1-million-through-mayors-court
If the story was about police prosecuting speeders when they're not actually speeding, that would be a good corruption angle. As it is, the entire scheme only exists because drivers cannot fucking drive at the speed limit.