Ah, so they died of excited delirium. ( https://leb.fbi.gov/articles/featured-articles/excited-delir... https://slate.com/news-and-politics/2015/06/excited-delirium... )

Crazy interpretation:

> What do we make of a syndrome that seems to occur almost unerringly when a police officer is choking, hog-tying, or stunning with a Taser someone with a mental illness or drug addiction? And why do many experts dispute that the diagnosis even exists? While excited delirium is used to explain a significant number of deaths occurring in police custody, the term has not been recognized as a genuine mental health condition by the American Medical Association, the American Psychological Association, or the World Health Organization.

Despite that:

> Medical examiners and police departments say it’s a genuine syndrome. The National Association of Medical Examiners has recognized the condition for more than two decades. And in 2008, the Council of the American College of Emergency Physicians declared that excited delirium is “a real syndrome of uncertain etiology.”