Undercover agent.
Undercover agent. The term undercover agent means an officer of any Federal, State, or local law enforcement agency who becomes a patient or employee for the purpose of investigating a suspected violation of law or who pursues that purpose after becoming a patient or becoming employed for other purposes.
Source
38 CFR § 1.460
Scoping language
For purposes of 1.460 through 1.499 of this part, the following definitions apply: