What happened is pretty clear (even if some are predictably trying to make it about drugs), and he's guilty of whatever is legally appropriate.Not guilty of murder.
But guilty of some appropriate lesser charge.
Manslaughter, wrongful death, aggravated assault resulting in death, sumfin'...
I only have one question, and it may have already been addressed in the trial: How does the officer's actions compare to current training and rules? Depending on that answer, this might be another situation in which we need to know (and perhaps fix) expectations put on these guys. If the rules under which he operates indicate that what he was doing was acceptable, that needs to be addressed. Nationally.