Mo. Rev. Stat. § 610.131: Expungement for persons convicted of prostitution.

1. Notwithstanding the provisions of section 610.140 to the contrary, a person who has pleaded guilty to or has been convicted of the offense of prostitution under section 567.020 may apply to the court in which he or she pled guilty or was sentenced for an order to expunge from all official records all recordations of his or her arrest, plea, trial, or conviction. If the court determines that such person was acting under the coercion, as defined in section 566.200, of an agent when committing the offense that resulted in a plea of guilty or conviction under section 567.020, the court shall enter an order of expungement.

2. Upon granting of the order of expungement, the records and files maintained in any administrative or court proceeding in an associate or circuit division of the circuit court under this section shall be confidential and only available to the parties or by order of the court for good cause shown. The effect of such order shall be to restore such person to the status he or she occupied prior to such arrest, plea, or conviction and as if such event had never taken place. No person as to whom such order has been entered shall be held thereafter under any provision of any law to be guilty of perjury or otherwise giving a false statement by reason of his or her failure to recite or acknowledge such arrest, plea, trial, conviction, or expungement in response to any inquiry made of him or her for any purpose whatsoever and no such inquiry shall be made for information relating to an expungement under this section.