Traumatic asphyxia, however, is a precise medical term, and doesn't just mean "pressing on the windpipe".
"Traumatic asphyxia, or Perthes's syndrome, is a medical emergency caused by an intense compression of the thoracic cavity, causing venous back-flow from the right side of the heart into the veins of the neck and the brain."
Note that the coroner, by definition an agent of the state and therefore not impartial, came out and said "The combined effects of Mr. Floyd being restrained by the police, his underlying health conditions and any potential intoxicants in his system likely contributed to his death."
Catch that? "Being restrained by the police." "any POTENTIAL intoxicants" -- muddying the water, they haven't identified any yet.
"Likely contributed" -- not a definitive dismissal.
This is sophistry so they can hope to avoid monetary damages.
The important thing is, it appears from the AUTOPSY that Chauvin did not kill Floyd by cutting off his air supply. Floyd probably had a heart attack brought on by drugs, disease, and MAYBE stress from the situation.
Gee, but that sounds a whole lot less terrible than Chauvin done killed the man by putting his knee on his neck, doesn’t it.