A statement of probable cause must be in writing and shall:
Mo. R. Crim. P. 22.03
Committee Note - 1979
The following portions are new:
(1) ". . . and a finding by the court that sufficient facts have been stated therein to show probable cause that a felony has been committed. . . ."
(2) ". . . unless the court orders the issuance of a summons."
Compare: Prior Rule 21.08, prior Rule 21.10 and Fed. R. Crim. P. 4(a).