"George Floyd death homicide, official post-mortem declares":
https://www.bbc.com/news/world-us-canada-52886593"The 46-year-old suffered a cardiac arrest while being restrained by Minneapolis police, the report found.
It listed Mr Floyd's cause of death as 'cardiopulmonary arrest complicating law enforcement subdual, restraint, and neck compression'."
As for the perpetrator:
"In early 2021, Chauvin was put on trial for unintentional second-degree murder, third-degree murder, and second-degree manslaughter of Floyd before a jury in the Minnesota Fourth Judicial District Court. On April 20, he was convicted on all of the charges."
In other words, you are wrong. And based on your other comments, it seems that you've fallen victim to the right-wing propaganda machine. I suggest that you seek other, more factual sources of news.