Aortic dissection. Edit the film and hide the fact that he was having a drug induced heart attack but go ahead and copy the I cant breathe narrative. If he had a dissection nothing could have saved him except emergency surgery in the back of the police car.Ask John Ritter and Jamie Dimon of JPMorgon. Once the burst starts it is painful and then you die.
And you would see it on autopsy. They did not
There was no evidence of a dissecting aortic aneurysm on autopsy and if he had had one it would have been impossible to miss. He did not have a heart attack if, by that, you are talking about an infarction caused by occlusion of the coronary arteries.
He almost certainly experienced sudden death mostly likely from a heart rhythm disturbance which he was at risk of as a result of an enlarged heart found on autopsy. This may have been secondary to hypertension which he was diagnosed with or perhaps a condition called hypertrophic cardiomyopathy. Alternatively, he may have had carotid sinus syndrome and pressure on his carotid sinuses may have caused a malignant heart rhythm disturbance.
All of these possibilities are more likely because of substance abuse.
These are some of the problems law enforcement has with takedowns in the field. People are frequently intoxicated on who knows what and there is no available medical history for them to take precautions from.