Former Minneapolis police officer Derek Chauvin has filed an appeal, asking the state Court of Appeals to overturn his conviction for killing George Floyd in 2020, according to CNN. Chauvin was found guilty of second-degree unintentional murder, third-degree murder and second-degree manslaughter, and was sentenced to 22 1/2 years in prison by Hennepin County Judge Peter Cahill back in June, NPR reports.