Of course they did. US cops aren't paid for stopping crime, they are paid by finding profitable crimes to charge people with, largely being drug crime since they are the easiest cases with hefty fines and fees and programs they can be charged with. And since cops can't legally pull people over by random to do it, they find any and every excuse to pull people over. Cops want their excuses to be flimsy so they can extort the maximum amount of people with the least amount of effort, and no matter how flimsy the excuse that is enough to protect them from any and all liability.