Each member, officer, or employee in the legislative, judicial, and executive branches shall report any evidence of misuse of long-distance telephone service to the chief officer of the legislative body, judicial branch, executive office, or executive agency, and to the legislative auditor when appropriate. The legislative auditor shall investigate and report on evidence of misuse of long-distance telephone service of legislators, judges, constitutional officers, heads of executive departments and agencies, and state employees and, where appropriate, refer the evidence to other authorities.