Good afternoon Matthew,
I'm sorry to hear of your dilemma.
While I strive to give you an accurate and applicable answer to your question, and if I can possibly suggest an avenue by which you might have a successful legal outcome I will, I don’t have the ability to provide you with favorable law if it doesn't exist. As you read my answer to your question, I ask you to please don't shoot the messenger.
I'm afraid that the State of Missouri only allows expungement of convictions under very limited circumstances---basically that you were wrongfully convicted.
Your arrest must have been based on false information and the following conditions exist:
(1) There is no probable cause, at the time of the action to expunge, to believe the individual committed the offense;
(2) No charges will be pursued as a result of the arrest;
(3) The subject of the arrest has no prior or subsequent misdemeanor or felony convictions;
(4) 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; and
(5) No civil action is pending relating to the arrest or the records sought to be expunged. RSMo §§ 610.122 to 610.126.
To establish that the arrest was based on "false information" the petitioner in most cases must prove that the alleged victim - who knew the petitioner and on whose accusation his arrest was based - had falsely accused the petitioner. Martinez v. State, 24 S.W.3d 10, 20 (Mo. App. 2000). In all cases, the petitioner must prove that some or all of the information upon which the police relied to arrest the petitioner is simply a lie.
Under your circumstances, you will have to apply to the Governor of the State of Missouri for a Pardon. If you can obtain a Pardon you can get the court to seal the records.
I wish you well in 2020.
Please don’t forget that I only receive credit for having helped you when you click on the Accept Button located at my Answer.