Minn. Stat. § 641.04

Every instrument, or attested copy thereof, by which a prisoner is committed or liberated, shall be endorsed, filed, and safely stored by the sheriff or jailer, and delivered to the sheriff's or jailer's successor. When the process by which any prisoner is committed is required to be returned to the court, the sheriff or jailer shall duly certify and keep a copy thereof which shall be prima facie evidence of the sheriff's or jailer's right to retain the prisoner in custody.