Mo. Rev. Stat. § 571.093

If any sheriff retains records of permits to obtain concealable firearms issued under former section 571.090, as repealed by senate bills nos. 62 and 41 of the ninety-fourth general assembly, then such records shall be closed to the public. No such record shall be made available for any purpose whatsoever unless its disclosure is mandated by a valid court order relating to a criminal investigation.