Yanez fucked up, hard. He was clearly on edge and nervous from the start, put himself in a bad position, and the verbal commands he gave were utterly atrocious.

Yanez fucked up, hard. He was clearly on edge and nervous from the start, put himself in a bad position, and the verbal commands he gave were utterly atrocious. He asked for proof of insurance and ID, and then once Mr. Castile informed him of his weapons permit, Yanez said "don’t pull it out". However, to someone who isn't intending on pulling out his concealed-carry weapon, "don't pull it out" does not adequately and unambiguously signal "stop moving". Mr. Castile was obeying the command to show his ID and also had acknowledged the order not to pull out his gun. Yanez did not even entertain the possibility that Castile might not be reaching for a gun -- and the phraseology Yanez used is indicative of that. Had Yanez wanted Castile to stop moving altogether, he should have issued an unambiguous command to that effect; such as "stop moving" or "hands on the dashboard" or "put your hands out the window now". Yanez got himself all worked up and panicked before even making contact with the people in the car, issued verbal commands that were obeyed to the letter, shot up a compliant person, and then gave weird excuses about the smell of marijuana during questioning. Yes, someone in Castile's position could have stopped moving altogether when hearing "don't pull it out", but it really shouldn't be up to people stopped by police to try to reverse-engineer an officer's intentions and de-escalate the situation to avoid being shot by a nervous policeman. Obeying commands should be sufficient to not get shot up.