Mo. Rev. Stat. § 452.380: Temporary custody, motion for — dismissal of action, effect of.

1. A party to a custody proceeding may move for a temporary custody order. The motion must be supported by an affidavit. The court may award temporary custody after a hearing or, if there is no objection, solely on the basis of the affidavits.

2. If a proceeding for dissolution of marriage or legal separation is dismissed, any temporary custody order is vacated unless a parent or the child's custodian moves that the proceeding continue as a custody proceeding and the court finds, after a hearing, that the circumstances of the parents and the best interest of the child require that a custody decree be issued.