Mo. Rev. Stat. § 86.503

This fund shall be created in the following manner: All moneys at present remaining in the hands of any unincorporated police relief committee or association; all moneys arising from the sale of unclaimed personal property; all fines assessed against any delinquent officers by any board of police commissioners; all monthly, annual or periodical assessments of members as may be provided for by the rules of said association; all percentages of rewards allowed to members of any police force under the regulations of its department.