Two ex-cops convicted for violating George Floyd's civil rights will spend more time behind bars. A federal judge sentenced Tou Thao to three and a half years and J. Alexander Keung to three years in prison for their involvement in George Floyd's death. Keung pinned Floyd's back, and Thao held back bystanders while Derek Chauvin knelt on Floyd's neck for nine and a half minutes. Prosecutors say Keung didn't say anything to stop Chauvin.