Floyd deserves most of the blame for the incident. Chauvin should not have put his knee on Floyd's neck. He should have eased up on Floyd's neck after Floyd stopped moving, and he should have checked Floyd's vital signs after he stopped moving. But, again, Floyd never would have been pinned on the ground in the first place if he had simply gotten into the back of the police car as he was repeatedly instructed to do.
This is going to be the key in the manslaughter charge. After watching the video several times, it dawned on me, that there's no way to know how much actual pressure Chauvin was putting on Floyds neck. As someone with an extremely bad left knee (4 surgeries and arthritis) I can tell you that you can put your knee on something and not be applying pressure.
Example: You can place a tack on the ground, get in Chauvins position, put you knee on the tack and never even break the skin.
I can see several times that Chauvin released the pressure on Floyds neck, allowing him to either take his right chest off the ground (making room for the chest and lungs to expand and inhale). You can see a few times that Floyds neck was not pressed against the ground.
At first, when Floyd was still struggling, Chauvin has his knee firmly on Floyds neck. But as time goes by, and Floyd stops squirming, Chauvin knee is clearly raised (or the pressure is reduced)
Another important fact to mention. The cops knew that the ambulance was on their way. So there was no need to change anything about what they were doing.
And one more thing. From the time the ambulance pulled up, the paramedics took 2 full minutes to get Floyd into the ambulance. In fact, they didn't perform CPR or anything other than checking his pulse. The paramedic didn't tell Chauvin to get off his neck. Instead, after checking his pulse, he went back to the ambulance, pulled out the stretcher, straightened the gurney, put the pillow in place, along with some other non necessary actions before even getting the gurney on the ground.
2 full minutes, when someone is dying, is pretty important.