You may be right. I don't know. I disagree, but I don't know.
When they first released the full video, before the second autopsy was done, my first reaction when I saw it was he looked and acted like he had OD'd on opioids. I had no idea other than what I saw in the video that he had any drugs in his system. I have only seen ODs on opioid a few times and mostly in people who used prescriptions, like my grandmother. I got good enough at spotting it that one day I told my mom she had to call the Dr. And insist they do something because my grandmother was going to be in the hospital. 36 hours later she was in the hospital. Doesn't make me an expert.
Having said that, seriously and with all respect because you may be right and I could be wrong, but do you think you may be have some confirmation bias? You seem to be interpreting the video evidence and an autopsy showing sufficient levels of both opioid and amphetamines to cause death.
Or, as I said, I could be wrong. I wasn't there, I don't really know, but I could not convict someone without knowing 100% that they actually caused a death.