The United States Naval Criminal Investigative Service (NCIS) is the primary investigative law enforcement agency of the United States Department of the Navy. Its primary function is to investigate major criminal activities involving the Navy and Marine Corps. However, its broad mandate includes national security, counterintelligence, counterterrorism, cyberwarfare, 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 World War II. One-half of NCIS personnel are civilian, with the other half being US government investigators — 1811 series special agents. NCIS agents are armed federal law enforcement investigators, who frequently coordinate with other U.S. government agencies and have a presence in more than 41 countries and on U.S. Navy vessels. NCIS special agents are supported by analysts and other experts skilled in disciplines such as forensics, surveillance, surveillance countermeasures, computer investigations, physical security, and polygraph examinations.
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👉 Naval Criminal Investigative Service in the context of United States Army Criminal Investigation Command
The United States Department of the Army Criminal Investigation Division (CID or DACID), previously known as the United States Army Criminal Investigation Command (USACIDC), is the primary federal law enforcement agency of the United States Department of the Army. Its primary function is to investigate felony crimes and serious violations of military law and the United States Code within the US Army. The division is an independent federal law enforcement agency with investigative autonomy; CID special agents, both military and civilian, report through the CID chain of command to the CID Director, who reports directly to the Under Secretary of the Army and the Secretary of the Army. Unlike their counterparts at OSI and NCIS, Army CID does not have primary counterintelligence responsibilities, as this jurisdiction resides with United States Army Counterintelligence Command (ACI).
USACIDC was established as a United States Army command in 1971 and is headquartered at Marine Corps Base, Quantico, Virginia. Worldwide, the organization has slightly fewer than 3,000 soldiers and civilians, of whom approximately 900 are special agents. The initialism "USACIDC" was used to refer to the Army command itself, while criminal investigation personnel and operations are commonly referred to using the shortened initialism "CID", which has its history in the original Criminal Investigation Division formed during World War I. The name restoration to Criminal Investigation Division became official after 2021 reform.