I wasn’t able to access your article, but I did a little digging into this story. I don’t see anything about having his neck kneeled on.
Additionally, in looking at the autopsy, “Timpa died within 20 minutes of police officers' arrival, of ’cocaine and the stress associated with physical restraint’”.
Additionally, “…three medical examiners,
including one hired by Mr. Timpa’s family, said they did not believe the officers acted recklessly.”
“You’re going to kill me,” Mr. Timpa shouted repeatedly in newly released body-camera video. An autopsy classified his 2016 death as a homicide.
www.nytimes.com
Looks like this guy actually died from drugs, not from being choked out. But I do agree that the police officers acted immaturely, joking as this guy faded away.