In my opinion he is guilty of involuntary manslaughter. There was no intent, but he was certainly reckless and used unnecessary force to detain Floyd.
THE KEY TO THIS CASE - is a provision in the law called "reduced responsibility" in the cause of someone's death.
This is absolutely the case with Chauvin because Floyd's cause of death is at LEAST 50% his own by consuming a fatal dose of a drug and THREE TIMES, refusing medical assistance and lying about whether he took a high does to avoid getting caught.
In the unedited video an officer asked Floyd did he consume any drugs because he was acting "funny". The officer said out loud 'you are worrying me, there is an ambulance right over there - you sure about this? And again Floyd said no.