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  2. Naval Criminal Investigative Service - Wikipedia

    en.wikipedia.org/wiki/Naval_Criminal...

    The United States Naval Criminal Investigative Service (NCIS) is the primary investigative law enforcement agency of the U.S. Department of the Navy.Its primary function is to investigate major criminal activities involving the Navy and Marine Corps, though its broad mandate includes national security, counterintelligence, counterterrorism, cyberwarfare, and the protection of U.S. naval assets ...

  3. Criminal investigation - Wikipedia

    en.wikipedia.org/wiki/Criminal_investigation

    Criminal investigation is an ancient science that may have roots as far back as c. 1700 BCE in the writings of the Code of Hammurabi. In the code, it is suggested that both the accuser and the accused had the right to present evidence they collected. [2] In the modern era, criminals investigations are most often done by government police forces.

  4. Defense Criminal Investigative Service - Wikipedia

    en.wikipedia.org/wiki/Defense_Criminal...

    The Defense Criminal Investigative Service (DCIS) is the criminal investigative arm of the U.S. Department of Defense Office of Inspector General.DCIS protects military personnel by investigating cases of fraud, bribery, and corruption; preventing the illegal transfer of sensitive defense technologies to proscribed nations and criminal elements; investigating companies that use defective ...

  5. Special agent - Wikipedia

    en.wikipedia.org/wiki/Special_agent

    v. t. e. In the United States, a special agent is an official title used to refer to certain investigators or detectives of federal, military, tribal, or state agencies who primarily serve in criminal investigatory positions. Additionally, some special agents operate in criminal intelligence, counterterrorism, or counterintelligence -based ...

  6. Detective - Wikipedia

    en.wikipedia.org/wiki/Detective

    A detective is an investigator, usually a member of a law enforcement agency. They often collect information to solve crimes by talking to witnesses and informants, collecting physical evidence, or searching records in databases. This leads them to arrest criminals and enable them to be convicted in court. [1]

  7. FBI Criminal Investigative Division - Wikipedia

    en.wikipedia.org/wiki/FBI_Criminal_Investigative...

    The Criminal Investigative Division (CID) is a division within the Criminal, Cyber, Response, and Services Branch of the Federal Bureau of Investigation.The CID is the primary component within the FBI responsible for overseeing FBI investigations of traditional crimes such as narcotics trafficking and violent crime.

  8. Internal affairs (law enforcement) - Wikipedia

    en.wikipedia.org/wiki/Internal_affairs_(law...

    Internal affairs (law enforcement) Internal affairs (often known as IA) is a division of a law enforcement agency that investigates incidents and possible suspicions of criminal and professional misconduct attributed to members of the parent force. It is thus a mechanism of limited self-governance, "a police force policing itself".

  9. Federal law enforcement in the United States - Wikipedia

    en.wikipedia.org/wiki/Federal_law_enforcement_in...

    Federal officers' most common primary function was criminal investigation or enforcement (68%), corrections (25%), and police response and patrol (9%). Around 15% of federal law enforcement officers and 13% of supervisory law enforcement personnel were female in 2020. More than a third (38%) of federal officers were members of a racial or ...