Floyd had overdose concentrations of fentanyl and morphine in his system.

That's a lie.

fentanyl isn't what killed Floyd, and the amount in his system was similar to that found in people who took the drug and were arrested for DUI, but didn't die.

Blood tests conducted as part of Floyd's post-mortem autopsy revealed 11 nanograms per milliliter, or ng/ml, of fentanyl present. According to expert witnesses, this wasn't enough to be considered fatal.

He stated because fentanyl typically slows down a person's breathing, the drug was not a contributing factor based on his calculations of Floyd's breathing rate based on witness video, which at the time appeared about the same as a healthy individual.

While Floyd's toxicology report did reveal fentanyl present, expert witnesses at his murder trial have stated there was not enough to be considered fatal or impact his breathing and oxygen levels. Floyd died due to lack of oxygen from the force of Chauvin's knee on his neck.

That alone should have been enough for reasonable doubt as to the cause of death.

Too bad the cop's lawyer did not bring that up in court.

Chauvin supposedly was perfectly fine following police procedure

It's police procedure to have put all your weight on your knee when you place your knee on a guy's neck and back for 8 minutes straight? If he was following police procedure, why didn't his lawyer bring that up in court? Why is it that there was a current cop said what Chauvin did is not procedure?

Lt. Johnny Mercil, who has been in charge of teaching the use of force in the Minneapolis Police Department's training division, says former officer Derek Chauvin's use of his knee on George Floyd's neck is not a technique the police teach when instructing officers how to restrain people.

Too bad Chauvin's lawyer failed to bring up in court that Chauvin was following procedure even though Lt. Johnny Mercil testified to say Chauvin did not follow police procedure.

Floyd said he had trouble breathing in advance of being put prone

Liar, he said he's claustrophobic.

and could clearly breathe well enough to keep proclaiming that he couldn't breathe.

lol!

In court, Blackwell asked Tobin whether it's true that if someone can talk, they can breathe. Tobin replied that it is true, but he warned it can give people a false sense of security. "At the moment that you are speaking, you are breathing," he said, "but it doesn't tell you that you're going to be breathing five seconds later."

As Floyd struggled to breathe, Tobin said, he eventually pressed his own forehead, nose and chin into the asphalt, attempting to "crank up" his chest to let air in. But as Floyd turned his head on its side, Tobin said, Chauvin's knee moved further toward the side of Floyd's neck, compressing his hypopharynx. Anyone experiencing that type of compression would find it "enormously more difficult to breathe," Tobin said.

Truly a verdict worthy of the inverted Clownworld we're living in.

Honk! Honk!

Hopefully he wins an appeal or something.

Maybe his appellate lawyer will argue ineffective counsel because from what I have read in your post, you raised a lot of issues Chauvin's lawyer failed to bring up.

I wonder if he had a choice to be tried by a judge instead.

He did but he chose not to because his lawyer said he would have a better chance with a jury than with a judge. A judge is not an idiot like the people who compose a jury.