Miss. Code § 73-3-49
Where two (2) or more attorneys at law of this state are associated together in practice as attorneys or counselors at law, and one (1) of such attorneys shall be district attorney of his district or the county attorney of his county, it shall be unlawful for such other attorney, or partner, to appear and defend in any of the courts of that county any person charged with a misdemeanor or felony, and this section shall apply, even though such association may exist only for the transaction of civil business in a particular court.
Any attorney violating this section shall be deemed guilty of a misdemeanor and, on conviction shall be fined in the sum of not less than Ten Dollars ($10.00) nor more than One Hundred Dollars ($100.00), and shall forfeit his license to practice law in this state.
Miss. Code § 73-3-49