The longest-serving police officer in the Minneapolis Police Department indicated on Friday that
Derek Chauvin had violated department policy by failing to move George Floyd off of his stomach as he knelt on him for more than nine minutes.
Lt. Richard Zimmerman, who leads the department’s homicide unit and responded to the scene of Mr. Floyd’s death after he was taken away in an ambulance, testified in court that officers are taught to move a handcuffed person out of the prone position as quickly as possible and that
they had never been trained to kneel on people’s necks while they were handcuffed and lying on their stomachs.
https://www.nytimes.com/live/2021/04/02/us/derek-chauvin-trial