Miss. Code Ann. § 13-7-23: Miss. Code Ann. § 13-7-23

Once a state grand jury has entered into a term, the petition and order establishing and impaneling the state grand jury may be amended as often as necessary and appropriate so as to expand the areas of inquiry authorized by the order or to add additional areas of inquiry thereto, consistent with the provisions of this chapter. The procedures for amending this authority are the same as those for filing the original petition and order.