I’d have to say that 5 minutes of knee on the neck is enough to kill depending on how much pressure was exerted.
I noticed that that cop kept telling the completely immobilized man to get up, all the while he had the guy pinned to the ground with knee on neck. I suspect the cop's defense is going to be resisting arrest and failure to obey the commands of a police officer.
That was brutal........I was almost yelling get off him.