There was an analysis that I posted the link to earlier. The person analyzing the autopsy report says that the spinal cord was stretched, making it impossible for Max to breathe. If he couldn't breathe, he couldn't talk (as in saying "Ocean"). I also am disturbed that RZ said she was giving the child CPR (so says the report) but when the officer walked in, she was not.
Exactly. It really doesn't matter the reason Max couldn't breathe, what matters is that he needed immediate CPR to keep his blood circulating to the brain and didn't receive it.
JMO