Missouri expungement law, under Mo. Rev. Stat. § 610.122, permits someone with an arrest for a traffic offense which was dismissed or nolle prossed to have the case expunged. It also allows for someone arrested without probable cause to expunge the case. When granted, an expungement allows for the person to deny the arrest ever occurred in most circumstances.
If you are looking for information on expunging cases which were charged and then dismissed which do not meet the requirements of this statute, see Mo. Rev. Stat. § 610.140.
(1) The court determines that the arrest was based on false information and the following conditions exist:
(a) There is no probable cause, at the time of the action to expunge, to believe the individual committed the offense;
(b) No charges will be pursued as a result of the arrest; and
(c) The subject of the arrest did not receive a suspended imposition of sentence for the offense for which the arrest was made or for any offense related to the arrest; or
(2) The court determines the person was arrested for, or was subsequently charged with, a misdemeanor offense of chapter 303 or any moving violation as the term moving violation is defined under section 302.010, except for any intoxication-related traffic offense as intoxication-related traffic offense is defined under section 577.023 and:
(a) Each such offense or violation related to the arrest was subsequently nolle prossed or dismissed, or the accused was found not guilty of each offense or violation; and
(b) The person is not a commercial driver's license holder and was not operating a commercial motor vehicle at the time of the arrest.
2. A record of arrest shall only be eligible for expungement under this section if:
(1) The subject of the arrest has no prior or subsequent misdemeanor or felony convictions; and
(2) No civil action is pending relating to the arrest or the records sought to be expunged.
(L. 1993 H.B. 170 § 1 merged with H.B. 562 § 11, A.L. 1995 H.B. 135, A.L. 2014 H.B. 1665 & 1335)
(2005) Statutory expungement of criminal records is civil in nature and is constitutional under legislative procedural requirements and provisions of ex post facto, equal protection, due process, and separation of powers. In re Dyer, 163 S.W.3d 915 (Mo.banc).