Lets step back for some background. First Here is the 911 call on Floyd..[www.youtube.com]
Quote from the call..." Um someone comes our store and give us fake bills and we realize it before he left the store, and we ran back outside, they was sitting on their car. We tell them to give us their phone, put their (inaudible) thing back and everything and he was also drunk and everything and return to give us our cigarettes back and so he can, so he can go home but he doesn't want to do that, and he's sitting on his car cause he is awfully drunk and he's not in control of himself."
So Floyd buys merchandise in the store with fake money,was drunk and not in control of himself per the 911 call. The store gave him the opportunity to return the purchased items, Floyd refuses and then just sits on his car. So he doesn't leave or try to get away.
More background. Keep in mind they sent 4 cops. Why so many?
Well they worked security together at the same club [people.com] as bouncers and Chauvin, the cop, worked there for 17 YEARS. You can believe Chauvin, as a cop knew, Floyd's demeanor, personality and capability. So some questions, What did Chauvin know about Floyd? Did Chauvin share info about Floyd to his dept. or other cops? Is this why they sent at least 3 cop cars and 4 cops? What led up to Floyd coming to the store and why did he not return the purchase items when given the opportunity and why didn't he leave? Was he that messed up and if he was, what was he on?
Now the knee on the neck.
Now I'm not endorsing anything, but a knee on someones neck can be used from a means of controlling to causing them to pass out from lack of blood flow. Its hard to tell if Chavin just has his knee on the neck or if he is bearing down? From what I can see Chavin is just using a level of his body weight on the neck as control and not leaning forward to put extra force on the artery which would cause Floyd to pass out. Keep in mind Floyd was a club bouncer which means he could handle himself so weakening him may have been prudent? We don't know Floyd's abilities? Keep in mind that even with Floyd possibly being under control by Chavin he could still escape if the other cops weren't holding him down. The knee on the carotid artery doesn't prevent air flow it prevents blood flow. Its why Floyd could breathe and talk. Also flexing the neck muscles and repositioning the head can reduce the effects of compression on the artery. I can't tell if Floyd is flexing his neck muscles but I can see he's not changing his head angle to lessen the effects of Chauvin's knee. Now maybe he was to drunk or stoned to do this but its almost muscle memory to relieve the pressure when your body isn't getting blood flow? Or maybe Floyd wasn't concerned about passing out from the knee on his neck. So we don't know yet its all allegation this is what caused Floyd's death and it may well be.
But again there is a lack of evidence and info about a bunch of stuff, yet, just like with Michael Brown of Ferguson fame, ( remember "Hands up don't Shoot? ) we have the media making the narrative and the immediate introduction of the professional rioters.
I have the feeling there is a whole lot more to this event then what we know right now.