Mo. Rev. Stat. § 434.050

Every stakeholder who shall knowingly receive any money or property, staked upon any betting declared gaming by the foregoing provisions, shall be liable to the party who placed such money or property in his hands, both before and after the determination of such bet; and the delivery of the money or property to the winner shall be no defense to any action brought by the losing party for the recovery thereof; provided, that no stakeholder shall be liable afterward unless a demand has been made of such stakeholder for the money or property in his possession, previous to the expiration of the time agreed upon by the parties for the determination of the bet or wager.