Wyo. Stat. Ann. § 7-4-202

If any juror fails to appear, the coroner shall immediately summon the proper number from the bystanders and proceed to impanel them. He shall administer the following oath: "You do solemnly swear (or affirm) that you will diligently inquire and truly present if known or determinable, the time and date of death, and by what means and manner the death of (NAME OF DECEASED) was caused, according to your knowledge and the evidence given you, so help you God." 7-4-203. Issuance of subpoenas; witness fees; enforcement of attendance. The coroner may issue subpoenas and compel the attendance of witnesses to testify at the inquest. Witnesses shall be allowed the same fees as in cases before a circuit court, and the coroner shall have the same authority to enforce the attendance of witnesses and to punish for contempt as provided by W.S. 1-21-901 through 1-21-909.