Tou Thao, who worked for the Minneapolis Police Department, held back bystanders as other officers restrained Mr. Floyd in a way that led to his death.
A judge sentenced J. Alexander Kueng, who held Mr. Floyd down with his knee, to three years in prison. Another officer is expected to be sentenced soon.
Mr. Lane, 39, helped to hold Mr. Floyd down while another officer fatally knelt on his neck. He was the only officer to suggest they should roll Mr. Floyd on his side so he could breathe.