Mo. Rev. Stat. § 66.020: Style of prosecutions — complaints — sufficiency of testimony.

1. All prosecutions for the violation of such a county ordinance shall be titled:

"The county of ______ against ______" (naming the county and the person or persons charged).

2. The complaint when made by a peace officer against any person arrested without process and in custody shall be reduced to writing and sworn to by such officer and an information filed with the court as provided in section 66.030 before such person shall be put upon his trial.

3. In no case shall a judgment of conviction be rendered except when sufficient legal testimony is given on a public trial or upon a plea of guilty.