this is what ker hyang testified to. these are things that police officers are trained to look for in a crisis of potential aggression. how do you respond to it? you stay calm, you maintain space. you speak slowly and softly and you avoid staring and eye contact. again, these are things that ker hyang discussed in terms of how to deal with a crisis. as this crowd grew more and more upset or deeper into crisis, a very critical thing happens at a very precise moment. i cannot understate this critical moment. if you recall from dr. tobin's testimony, and nobody disagreed, that mr. floyd took his last breath at 8:25:16. what is happening at the very precise moment that mr. floyd takes his last breath? you're taking one piece of evidence and you're comparing it against the rest. this moment, 8:25:16 as mr. floyd is taking his last breath. >> look at him. >> three things happen. mr. floyd takes his last breath. you see officer chauvin's reaction to the crowd is to pull his mace and shake it. he's threatening the use of force a