Mo. Rev. Stat. § 545.060: Indictment to have name of prosecutor — by whom made — effect of failure.

The name of the prosecutor must be affixed to such indictment; but no indictment shall be quashed for the want of affixing such name, if the same shall be made before the motion to quash is disposed of, and in no case shall the judgment be arrested or the trial discontinued after it has been commenced, for the want of such endorsement.