How do investigations start? The Office of Inspector General (OIG) receives information, which may be characterized as a complaint, allegation, or referral. National Labor Relations Board (NLRB) employees are the greatest single source of this information. NLRB management also may provide information to the OIG.

The OIG initiates investigations based upon information from a variety of sources, including complaints made to the OIG Hotline; information uncovered during its inspections, audits, and reviews; and referrals from other Agency organizations.

Unlike the CIA and the Defense Intelligence Agency (DIA), both of which specialize primarily in foreign human espionage, the NSA does not publicly conduct human intelligence gathering.

What does the NSA do? The National Security Agency leads the U.S. government in cryptology that encompasses both signals intelligence (SIGINT) insights, cybersecurity products and services and enables computer network operations to gain a decisive advantage for the nation and our allies.