Look for the Chauvin video with his knee actually on the shoulder blade.
I fault Chauvin for gross negligence and dereliction of duty as Floyd died in his hands and he did not respond, not even when his own officer said there was no pulse.
I don’t know if Floyd was suffocated by the weight of the officers and their positioning of him, or to what degree that was a factor in his death. Chauvin still bears fault.