The autopsy and tox report will go a long way to answering that question.
The guy was out of his mind on something, and based on the video, I’d suspect he was shermed out, and probably had some alcohol on board as well. And weed.
Watching the video, I can’t see any animus on the part of the officers, just dealing with a very large, and very intoxicated suspect. Once he decided he didn’t want to go in the car, and went to the ground, the decision was made to just keep him immobilized until fire could get there for medical attention.
That’s the obvious question that isn’t in the record at this time: when did they call for fire? He was on the ground for less than 10 minutes, so someone on the PD must have called, at latest, as soon as he went down.
I wouldn’t have chosen to use the neck restraint, but that’s easy to say sitting in my den sipping a cold iced tea. Is an investigation warrented? Of course. Is the video dispositive evidence of incompetence or malice? No way.
You are assuming that the Hennepin County ME is not a union owned incompetent hack and that his autopsy findings won’t be challenged.