Missouri Revised Statutes Title XXXIII. Evidence and Legal Advertisements § 491.600. Courts with criminal jurisdiction may issue orders to protect witness or victim

(1) An order that a defendant not engage in activity as defined by section 575.270 and maintain a prescribed geographic distance from a witness or victim;

(2) An order that a person before the court other than a defendant, including but not limited to a subpoenaed witness or other person entering the courtroom of said court, not engage in activity as defined by section 575.270, and maintain a prescribed geographic distance from a witness or victim;

(3) An order that any person described in subdivision (1) or (2) of this section have no connection whatsoever with any specified witness or any victim, except through an attorney under such reasonable restrictions as the court may impose.