I know for sure that in Missouri, Mark Twain in particular, it is required that each person have a method for keeping track of the fish they caught .... and must stop keeping fish once they have caught their limit.....My brother and I used a guide down there once, and he was VERY particular about tagging each person's fish.........Maybe Illinois is following suite.

It does seem like a conservation officer must have been the client, otherwise I don't know how they could have compiled the evidence for all those citations.