The mittimus or process by which any prisoner is committed or discharged from jail, or an attested copy thereof, must be filed and retained at the sheriff’s office by the sheriff or the jailer under the sheriff's direction. T.C.A. § 41-4-106. “A mittimus is an affidavit to the sheriff or jailer as to the defendant's sentence. A mittimus serves to direct the jailer or sheriff as to a prisoner's commitment or discharge and is kept by the sheriff, or jailer, under the sheriff's direction.” Taylor v. State, 2005 WL 578825 (Tenn. Crim. App. 2005); Carr v. Mills, 2000 WL 1520267 (Tenn. Crim. App. 2000).