[Deaf Smith]

It appears that Floyd died during the restraint (knee to side of neck) evidence by release of his bladder onto the street (most likely bowels too).

Death relaxes all muscles, as in his neck.

The continued use of force would easily allow the neck vertebrae to separate...post mortem.

The still pics show his neck in a very unnatural position during forced restraint.

[walkingdead]

I agree with the seperation of vertebrae, although not sure when (may or may not be post? Although relaxing of muscles upon death surely would make that easier)

I am an engineer. I have watched that video many times. Here is what I see from an engineering point of view.

I watched the knee placement very closely. As an engineer, I watched the knee work its way down to wedge itself between the shoulder and the base of the skull. In this position, with the lever arm and fulcrum point, only a slight amount of force applied, in the right direction, could in fact pop the skull right off the spinal column.

Think of a pry bar, with the knee working as the pry bar, the shoulders working as the pivot point, and the base of the skull being the pried object. I simply cannot believe this is taught, and if it is, it needs to stop immediately. This is a perfect setup for paralysis or death.