How To Use Government Resources, Data and Information for Research and Investigations

The United States Government makes a wealth of resources and information available to the general public that can be extremely useful for private investigators.

United States Government Intelligence Agencies

United States Government Intelligence Agencies were created by the United States Government to provide protection for America and its citizens.  U.S. Intelligence agencies provide national security by:

  • Gathering, evaluating and disseminating information that affects national security and the safety of American citizens, land and property
  • Providing intelligence to the military, including the Marines, Army, Air Force and Navy
  • Protecting the nations borders
  • Reducing America’s vulnerability to terrorism and terrorist acts
  • Investigating specific crimes
  • Advising on foreign policy matters

Following are links to U.S. Government Intelligence Agencies.  These United States Government Intelligence Agency websites are resources for obtaining information about U.S. government and military intelligence, business intelligence, and jobs related to the intelligence field.


The Central Intelligence Agency (CIA)

Central Intelligence Agency (CIA) – The Central Intelligence Agency, headquartered in Langley, Virginia, was created in 1947 with the signing of the National Security Act by President Harry Truman. The National Security Act charged the Director of Central Intelligence (DCI) with coordinating the nation’s intelligence activities and correlating, evaluating and disseminating intelligence which affects national security. Learn more by reading these CIA Books.

Defense Intelligence Agency

The Defense Intelligence Agency provides military intelligence to defense policy makers and force planners in the Department of Defense and the general Intelligence Community. The agency provides such intelligence to support of the U.S. military in planning and operations and weapon systems acquisition.

Department of Homeland Security – The new Department of Homeland Security (DHS) has three primary missions: Prevent terrorist attacks within the United States, reduce America’s vulnerability to terrorism, and minimize the damage from potential attacks and natural disasters.

Federal Bureau of Investigation – The Federal Bureau of Investigation (FBI) is the investigative arm of the US Department of Justice. The FBI’s investigative authority can be found in Title 28, Section 533 of the US Code. Additionally, there are other statutes, such as the Congressional Assassination, Kidnapping, and Assault Act, which give the FBI responsibility to investigate specific crimes. Learn more by reading these FBI books.

National Security Agency (NSA)

The National Security Agency (NSA) was created on November 4th, 1952 by President Harry S. Truman. The NSA, which is headquartered in Fort Meade, Maryland, is a cryptology intelligence agency of the United States Government.  The National Security Agency is administered as part of the United States Department of Defense. The National Security Agency is responsible for the collection and analysis of foreign communications and foreign signals intelligence, which involves the process of cryptanalysis.  The agency is also responsible for protecting United States government communications and information systems from similar agencies elsewhere, which involves the process of cryptography. The NSA is a key component of the U.S. Intelligence Community, which is headed by the Director of National Intelligence. The NSA’s work is limited to communications intelligence; it does not perform field or human intelligence activities. As of 2008, the National Security Agency has been directed to help monitor U.S. federal agency computer networks to protect them against attacks from other countries and terrorist organizations. The department is directed by a lieutenant general or vice admiral. The Central Security Service is a co-located agency created to coordinate intelligence activities and co-operation between the NSA and U.S. military cryptanalysis agencies.

Secret Service – The United States Secret Service is mandated by statute and executive order to carry out two significant missions: protection and criminal investigations. The Secret Service protects the President and Vice President, their families, heads of state, and other designated individuals; investigates threats against these protectees; protects the White House, Vice President’s Residence, Foreign Missions, and other buildings within Washington, D.C.; and plans and implements security designs for designated National Special Security Events. The Secret Service also investigates violations of laws relating to counterfeiting of obligations and securities of the United States; financial crimes that include, but are not limited to, access device fraud, financial institution fraud, identity theft, computer fraud; and computer-based attacks on our nation’s financial, banking, and telecommunications infrastructure.

Federal Agencies, Bureaus and Departments

State Information

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