This doesn't contradict what I said, because "moments before" is like 2 seconds. It seems plausible to me that the agent reacted to a gun being pulled out of pants and panic shot within 2 seconds. His gun was not already drawn, so that's a plausible lag time. If we assume that ICE did not execute a guy for literally no reason whatsoever, that seems to me the most likely explanation for why he drew and fired.
My dude, they were already beating him for no reason whatsoever. When someone showed me this video the first time, I thought the outrage was that they were beating a guy who wasn’t resisting for no reason whatsoever, which is true, but then they also killed him, again for no reason. They were already violent criminals before they murdered him. If he had been drawing it would have been justifiable self defense and ICE would still have been entirely in the wrong. Though he didn’t.