Wyo. Stat. § 7-11-402: Subpoena of witnesses for indigent defendants.

(a) Upon application of a defendant and upon a satisfactory showing that the defendant is financially unable to pay the fees of a witness and that the presence of the witness is necessary to an adequate defense, the court shall order that a subpoena be issued for service on a named witness and order that all fees and costs incurred be paid as provided by subsection (b) of this section.

(b) If the court orders a subpoena to be issued under this section, the costs incurred and the fees of the witness so subpoenaed shall be paid by the public defender's office.