Mo. Rev. Stat. § 508.120
No defendant shall be allowed a change of venue and no application by a defendant to disqualify a judge shall be granted unless the application therefor is made before the filing of his answer to the merits, except when the cause for the change of venue or disqualification arises, or information or knowledge of the existence thereof first comes to him, after the filing of his answer in which case the application shall state the time when the cause arose or when applicant acquired information and knowledge thereof, and the application must be made within five days thereafter.
(RSMo 1939 § 1060, A. 1949 H.B. 2118, A.L. 1957 p. 294)
Prior revisions: 1929 § 909; 1919 § 1359; 1909 § 1929