Mo. Rev. Stat. § 506.381: Court to review complaint.

1. The court shall review, before docketing, if feasible, or as soon as practicable after docketing, a complaint in a civil action in which an offender seeks redress from a governmental entity, officer or employee and shall identify cognizable claims or dismiss the complaint or any portion of the complaint, if the complaint:

(1) Is frivolous, malicious or fails to state a claim upon which relief may be granted; or

(2) Seeks monetary relief from a defendant who is immune from such relief.

2. If a civil action or appeal of a civil judgment is dismissed on the grounds that it was frivolous, malicious or failed to state a claim upon which relief may be granted, the court may order attorneys' fees and court costs to the defendant, and payment shall be made pursuant to section 506.372.