Watch that video. It's in Texas, but it could be anywhere in America... well, except now Washington and Colorado, because marijuana is not contraband there, and the smell of it in a car is not probable cause to search its driver and passengers.
In the video, reported by the UK Daily Mail and all over the national and international media, a trooper pulls over two women -- a woman and her niece -- for allegedly throwing a cigarette butt out of the car.
While talking to the women in the car over a littering charge, the trooper claims he smells marijuana. He then searches the car and finds no marijuana. He then administers a sobriety test, which the woman who was driving passed. No marijuana, no impaired driving, and the observation of a police officer that they might have littered from a car that smells like pot.