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Investigation, the work of a detective; Investigation, the work of a private investigator; Criminal investigation, the study of facts, used to identify, locate and prove the guilt of an accused criminal; Criminal investigation department, the branch of British Police force to which plainclothes detectives belong
Normal Justice Department parlance for subjects of investigation includes "suspect", "subject" and "target". Each has specific meanings relevant to different levels of investigation. Senator Chuck Grassley, Republican of Iowa, wrote to the Attorney General for clarification of the unfamiliar phrase in September 2002.
Usually used in the United States to refer to federal law enforcement agencies, especially the Federal Bureau of Investigation and the United States Marshals Service. Also used in Australia to refer to the Australian Federal Police, and in London as general slang for the Metropolitan Police Service. [23] Federales Spanish, the Mexican Federal ...
Criminal investigation is an applied science that involves the study of facts that are then used to inform criminal trials. A complete criminal investigation can include searching , interviews , interrogations , evidence collection and preservation, and various methods of investigation. [ 1 ]
The investigation of alleged misconduct by police officers can be conducted by the internal affairs unit, an executive police officer, or an outside agency. [2] In the Salt Lake City Police Department , the Civilian Review Board will also investigate the complaint, but they will do so independently. [ 4 ]
Informants are extremely common in every-day police work, including homicide and narcotics investigations. Any citizen who provides crime-related information to law enforcement by definition is an informant. [6] Law enforcement and intelligence agencies may face criticism regarding their conduct towards informants.
Accounting firm Arthur Andersen was charged with obstruction of justice in 2002 for allegedly destroying and altering documents in anticipation of an investigation of the Enron scandal. [28] The company was convicted and effectively destroyed, though the conviction was later overturned .
Modern-day criminal investigations commonly employ many modern scientific techniques known collectively as forensic science. 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 .