The County Medical Examiner determined that Floyd's blood sample was contaminated with 11 part per billion Fentanyl, when only five PPB is the lethal dose for the average human.
"most striking is how crazy Floyd was from the beginning. The officers tried to get him out of the vehicle in which he was parked and into their squad car so they could take him to a police station and book him for passing a counterfeit bill. This proved impossible. Floyd, in a highly emotional state, was yelling, “Don’t shoot me! Don’t shoot me!” when there was no prospect of his being shot.
Floyd wouldn’t get into the squad car, saying he was claustrophobic. The officers struggled with him for around ten minutes, but were never able to get him securely inside the squad car. At one point he tumbled out the opposite door of the squad car, onto the street. The officers, believing correctly that Floyd was high on drugs, called for an ambulance.
Floyd complained of being unable to breathe long before anyone knelt on his neck. (Shortness of breath is a symptom of fentanyl overdose.) He apparently preferred being on the ground to being inside the squad car."
https://www.powerlineblog.com/archives/2020/08/body-cam-footage-of-floyds-arrest-leaked.php