Mississippi Code Title 99. Criminal Procedure § 99-35-11

When an appeal is presented to the circuit court in any criminal case from the judgment or sentence of a justice of the peace or municipal court, it shall be permissible, on application of the state or party prosecuting, to amend the affidavit, pleading, or proceedings at any time before a verdict so as to bring the merits of the case fairly to trial on the charge intended to be set out in the original affidavit; the amendment to be made on such terms as the court may consider proper.