Mississippi Code Title 99. Criminal Procedure § 99-17-41

Bills of exceptions to any ruling of the court, made before the jury retires from the box, must be tendered and signed during the trial, or during the term of the court, and bills of exceptions to judgments overruling motions for new trials must be presented to the judge for his signature during the term or within ten days, or such further time, not exceeding sixty days, as the court may allow, after the end of the term, and must be signed promptly by him if found to be correct. If the death, resignation, or other incapacity of the judge shall prevent him from signing a bill of exceptions, the affidavit of the attorney of record who represented the party tendering the bill of exceptions, and of all of them if more than one, that it correctly states the facts and rulings of the court, shall be received as a substitute for the signature of the judge to it; but in such case, if the state shall file in the supreme court an affidavit that the bill of exceptions is not correct, stating particularly wherein it is not correct, the state may then file any affidavits touching the matter, and the defendant may likewise file any affidavits other than his own up to the time of the call of the case for trial in the supreme court; and said court shall consider and determine, on submission of the case, both as to the truth of the bill of exceptions and the questions involved in what the court may determine to be the bill of exceptions.