Mo. Rev. Stat. § 610.106: Suspended sentence prior to September 28, 1981, procedure to close records.

Any person as to whom imposition of sentence was suspended prior to September 28, 1981, may make a motion to the court in which the action was prosecuted after his discharge from the court's jurisdiction for closure of official records pertaining to the case. If the prosecuting authority opposes the motion, an informal hearing shall be held in which technical rules of evidence shall not apply. Having regard to the nature and circumstances of the offense and the history and character of the defendant and upon a finding that the ends of justice are so served, the court may order official records pertaining to the case to be closed, except as provided in section 610.120.