Mississippi Code Title 99. Criminal Procedure § 99-43-5

(1) If a victim is physically or emotionally unable to exercise any right established by this chapter, but is able to designate in writing a lawful representative, the designated representative or person may exercise the same rights that the victim is entitled to exercise. The victim may revoke his or her designated representation at any time and thereafter personally exercise his or her rights.

(2) If a victim is incompetent, deceased or otherwise incapable of designating another person to act in his or her behalf, the court may appoint a lawful representative who is not a witness in the case. If at any time the victim is no longer incompetent, incapacitated, or otherwise incapable of acting, the victim may personally exercise his or her rights.

(3) If the victim is a minor, the parent, guardian or other immediate family of the victim, or a designated representative as determined by the court, may exercise all of the rights of the victim on behalf of the victim.