Missouri Revised Statutes Title XXXVII. Criminal Procedure § 545.880. Joint trials, when--separate trials for joint defendants, when--probability of prejudice exists, when

(1) At least one but not all of the defendants jointly charged is, if convicted, subject to jury assessment of punishment; the defendant or defendants subject to jury assessment of punishment shall have the burden of showing the probability of prejudice if tried jointly;

(2) There is, or may reasonably be expected to be, material and substantial evidence admissible against less than all of the joint defendants;

(3) There exists an out of court statement of a codefendant which makes reference to another of the joint defendants, but is not admissible against that defendant, and if the statement cannot be properly limited so as to eliminate reference to the complaining defendant;

(4) Severance of the joint defendants is necessary to achieve a fair determination of guilt or innocence of any defendant.