fentanyl he had in his system he was dead before the cops ever arrived, his body just did not know it yet.
He had 11 Ng/ml of fentanyl in his bloodstream, 3 Ng/ml is usually fatal.
A person that is overdosing on fentanyl may exhibit the following signs and symptoms:
Low blood pressure
Drowsiness
Dizziness
Nausea and vomiting
Limp body
Changes in pupillary size
Cold and clammy skin
Blue colored lips and fingernails (cyanosis)
Slowed or stopped breathing
Decreased heart rate
Reduced or loss of consciousness
Coma
Any of those sound similar to his symptoms?
https://americanaddictioncenters.org/fentanyl-treatment/symptoms-associated-with-a-fentanyl-overdose