Mo. Rev. Stat. § 532.350

When the offense is clearly and specifically set forth in the warrant of commitment, no evidence other than the examination taken and certified thereunto shall be received for or against the prisoner, unless such examination has not been taken and certified according to law, in which case the committing judge may be examined, if desired by the prisoner, as to the evidence on which the commitment was found, and thereupon the court shall proceed to bail, discharge or remand the prisoner, as the circumstances of the case may require; and in the absence of all such evidence, the prisoner shall not be discharged, but may be bailed or remanded, according to the circumstances of the case.