5 U.S.C. § 407

(a) Receipt and Investigation .— The Inspector General may receive and investigate complaints or information from an employee of the establishment concerning the possible existence of an activity constituting a violation of law, rules, or regulations, or mismanagement, gross waste of funds, abuse of authority, or a substantial and specific danger to the public health and safety. (b) Prohibition on Disclosure of Identity .— The Inspector General shall not, after receipt of a complaint or information from an employee, disclose the identity of the employee without the consent of the employee, unless the Inspector General determines the disclosure is unavoidable during the course of the investigation. (c) Prohibition on Reprisal .— Any employee who has authority to take, direct others to take, recommend, or approve any personnel action, shall not, with respect to that authority, take or threaten to take any action against any employee as a reprisal for making a complaint or disclosing information to an Inspector General, unless the complaint was made or the information disclosed with the knowledge that it was false or with willful disregard for its truth or falsity.