Absolutely not. There have been freepers here who have conducted this same experiment and they discovered a knee on your neck will not kill you.
I've read accounts of other people also having replicated this event and they didn't die.
Fentanyl, on the other hand, does cause respiratory distress. Look it up.
I tried it (see #29), and know of other men that tried it. My brother was a cop, and told me he used it a few times (and later in his career he weighed over 250 pounds. Chauvin was around 160).
But you see, we are supposed to be stupid and driven by emotion. That’s what makes for a good shallow mind (like the silly young women that were screaming, crying, and passing out at Shea stadium in 64, because some mop headed Brits were singing songs).