Former Memphis police officer Desmond Mills Jr. pled guilty to federal and state charges on Thursday for the beating death of Tyre Nichols. As part of a larger agreement, Mills agreed to plead guilty to excessive force and obstruction of justice, and to act as a cooperating witness in both federal and state investigations. The Shelby County District Attorney's Office released a statement regarding Mills' plea, and the plea agreement is still subject to approval by the court.