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Naval Criminal Investigative Service

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Why I REACT: NCIS Supervisory Special Agent Dale Holder

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Why I REACT: NCIS Special Agent Dave Vaughan

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Sneak peek: 48 Hours: NCIS

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NCIS: Naval Criminal Investigative Service

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2018 National Police Week Feat. NCIS

The United States Naval Criminal Investigative Service (NCIS) is the primary law enforcement agency of the U.S. Department of the Navy. Its primary function is to investigate criminal activities involving the U.S. Navy and U.S. Marine Corps, though its broad mandate includes national security, counterintelligence, counter-terrorism, cyber warfare, and the protection of U.S. naval assets worldwide. NCIS is the successor organization to the former Naval Investigative Service (NIS), which was established by the Office of Naval Intelligence after the Second World War.
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