Breathing is periodic. Not breathing is death. Letting out a scream because of the difficulty of not breathing periodically is perfectly reasonable.
Unless you're trying to justify murder. Is that what you're playing word games to achieve? Ever witness someone ask for help during an asthma attack, or are you just entirely ignorant and indifferent to life threatening situations created by police intervention?
No, “not breathing” is not instant death, but choking, whether by external force or by internal swelling or inflammation of airways. If you can scream, you are definitely getting air into and out of your lungs. And Jaramillo was screaming repeatedly. The autopsy reveals what his health problems were.
I have relatives who suffer from asthma, and the last thing they can do during an attack is yell, much less repeatedly. Communication is with hands if the attack is really bad.