Again. Asphyxiation and strangulation are not mutually exclusive. One is a process, one is a cause of death. If you strangle someone to death, he dies of asphyxiation, brought on by strangulation.
But if someone passes out because you put pressure on his neck, and we can clearly observe this, then he is being strangled. So unless the air at ground level has a severely different composition or the man took a drug that both caused him to suffocate and bleed from nose and mouth, this man died from asphyxia brought on by strangulation.
Folly and fakery have always been with us... but it has never before been as dangerous as it is now, never in history have we been able to afford it less. - Isaac Asimov
Every damn thing you do in this life, you pay for. - Edith Piaf
The party told you to reject the evidence of your eyes and ears. It was their final, most essential command. - Orwell
No amount of belief makes something a fact. - James Randi
No it isn't. Unless you outright break someones neck or they are unconscious for another reason, he or she has minutes to let you know how much distress you cause them, there are a plethora of symptoms to observe when strangulating someone, like ruptured blood vessels in the eyes, nose, possibly mouth, and they will fucking tell you.
I am not really sure the solution here is to simply stop any form of detainment once a suspect complains. The solution sounds like they shouldn't resist arrest...
From the start he is clearly struggling rather then remaining calm. Without seeing the start of the video I have to assume he was resisting. Once violence is employed you do not deescalate it until the situation has resolved.
Granted this is from my military experience and law enforcement is a entirely different set of skills but unless he has a way to complete incapacitate a hostile entity you do not allow them to recover.
So, now you are a mind reader?
Do me a favor, handcuff yourself, behind your back, and see how fast you can get up. Now, have someone prevent you from getting up... it doesn't take much effort. It sure as shit doesn't require a knee into an unconscious man's neck... for minutes.
We have different definitions of calm and no you do not release someone you detain because they "calmed down" .
With the limited information I have from the video I don't see any startling cause of abuse. Two officers are detaining him and both are needed to pin him, This suggests he was extremely combative prior and forced the used of force. Without being able to see what caused this I can't be certain but I assume officers don't resort to that level of force unless their was a need.
A lot of what is seen here comes down to how you believe the police operate. We honestly won't know one way or the other unless video surfaces of what sparked the confrontation.
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I would have to agree with how combative he was while detained I would assume violence as well and that is with the calm ability to access the situation via video much less being personally involved. You don't gamble with your life like that.