If you’re saying that the man’s death was caused by inability to breathe due to a compressed airway, you may or may not be correct.
His death could also have been caused by a cardiac arrhythmia. Some people have hypersensitivity of their carotid sinus pressure receptors and can develop passing out spells or malignant heart rhythms with stimulation of their carotid sinuses. Kneeling on the neck could have contributed to that. Or he may have had a heart attack or any number of other possibilities that can result in sudden death.
I suspect this autopsy is pointing in the direction of one of these other causes of death ... that is, some preexisting condition that contributed to his demise.
Say for a moment all that is true. Absent the kneeling on the neck he would still be alive. It was the kneeling that killed him by triggering a pre-existing condition. So the officer should be held liable for third degree murder at least.
I suspect this autopsy is pointing in the direction of one of these other causes of death ... that is, some preexisting condition that contributed to his demise.
If I fire a shot at you and miss but you fall off the roof and die trying to get away then it isn't the shot that killed you but I'm going to face some sort of murder charge because of it.