"He was doin' 72 in a 70!"
"I stop a lot of people, you know, and very few are guilty of anything." Good work there Barney.
This cop believes going on a fishing expedition using the slimmest possible excuse is a good thing to do. He thinks he is doing his job. He thinks he is keeping you safe.
Or maybe... Does he really believe this? Or is he just another State employed Thug Opportunist?
By the way, "anhydrous" isn't a noun, it is an adjective. It means, without water or dessicated. It doesn't describe anything illegal. It is analogous to saying, "We find dihydrogen monoxide all the time on these stops."