Wyo. R. Prac. & P. 405
As amended through April 30, 2019
In all cases in which evidence of character or a trait of character of a person is admissible, proof may be made by testimony as to reputation or by testimony in the form of an opinion. On cross-examination, inquiry is allowable into relevant specific instances of conduct.
In cases in which character or a trait of character of a person is an essential element of a charge, claim, or defense, or is in issue under Rule 404(a)(2), proof may also be made of specific instances of his conduct.
Wyo. R. Prac. & P. 405