I don’t know of any use of force or restraint police policy or training that allows for a knee on the neck when the guy is proned out and already handcuffed. Been involved with writing and reviewing a few.
Another problem is the length of it which may allow for an inference malicious intention.
Again, you just can’t tell on something this serious until an investigation is complete. Even the lowest criminal in this country is entitled to that and due process.
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