Wyo. Const. art. 1, § 20: Freedom of speech and press; libel; truth a defense.

Every person may freely speak, write and publish on all subjects, being responsible for the abuse of that right; and in all trials for libel, both civil and criminal, the truth, when published with good intent and [for] justifiable ends, shall be a sufficient defense, the jury having the right to determine the facts and the law, under direction of the court.