Mississippi Code Title 9. Courts § 9-9-27

In any civil case instituted in the circuit court, wherein all parties file a motion to transfer said case to the county court for trial, or wherein all parties file an instrument of writing consenting to such a transfer, the circuit court may, in its discretion, transfer the case to the county court for trial; and the said county court shall have full jurisdiction of and shall proceed to try any case so transferred, provided, however, that such order of transfer be rendered prior to the empaneling of the jury in such cases.

In misdemeanor cases and in felony cases not capital, wherein indictments have been returned by the grand jury, the circuit court may transfer with full jurisdiction all or any of the same, in its discretion, to the county court for trial; and the said county court shall have jurisdiction of and shall proceed to try all charges of misdemeanor which may be preferred by the district attorney or by the county prosecuting attorney or by the sheriff on affidavit sworn to before the circuit clerk of the county; and prosecutions by affidavit are hereby authorized in misdemeanor cases under the same procedure as if indictments had been returned in the circuit court and same had been transferred to the county court.

And, provided further, any reputable citizen may make an affidavit charging crime before the judge of the county court, and such affidavit shall be filed with the clerk of the county court, and if the crime charged is a misdemeanor, the county court shall have jurisdiction to try and dispose of said charge and, if the crime charged be a felony, the county judge shall have jurisdiction to hear and determine said cause, the same as now provided by law to be done by justices of the peace, and to commit the person so charged, with or without bail as the evidence may warrant, or to discharge the defendant.