Wyo. Stat. § 6-6-203
The action, when brought, shall be triable at the first term of court after due and timely service of the notice has been given. In the action evidence of the general reputation of the place is admissible for the purpose of proving the existence of the nuisance. If the complaint is filed by a citizen, it shall not be dismissed except upon a sworn statement made by the complainant and his attorney, setting forth the reason why the action should be dismissed, and the dismissal approved by the county attorney in writing or in open court. If the court finds the action ought not to be dismissed, he may direct the county attorney to prosecute the action to judgment. If the action is continued more than one (1) term of court, any citizen of the county or the county attorney may be substituted for the complaining party and prosecute the action to judgment. If the action is brought by a citizen and the court finds there was no reasonable ground or cause for the action, the costs may be taxed to the citizen.
W.S. 6-6-203