He was already on drugs, then when the cop worked to get him out of the car he swallowed a pack of fentanyl. The average plasma level at postmortem examination is 16.9 ng/mL for people that died of a fentanyl overdose. He had 11 ng/mL on top of 5.6 ng/mL of norfentanyl and meth and weed. He didn't die from a lack of air.