George Floyd died of natural causes. Look at the autopsies.
"The Hennepin County medical examiner said an autopsy listed Floyd's cause of death on May 25 as a "cardiopulmonary arrest complicating law enforcement subdual, restraint, and neck compression." A spokeswoman declined to comment to a request for clarification. The official coroner still called it a homicide."
https://www.nbcnews.com/news/us-news/george-floyd-death-ruled-homicide-medical-examiner-n1221431
That isn't abnormal or unusual. If there is a precipitating act that brings on an acute exacerbation of a pre-existing condition, the act will be blamed for the result.
As natural as one could die with methamphetamine and fentanyl in your system.