investigation

• 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
• Federal Bureau of Investigation, the primary investigative arm of the US Department of Justice
• Tax investigation

• Clinical trial, an investigation conducted to collect data for new drugs or devices
• Investigational New Drug, a category in a USFDA program
• Outbreak Investigation

• Forensic science investigation, in fields such as accounting, science, engineering and information technology
• Investigations in Numbers, Data, and Space, a K-5 mathematics curriculum

• The Investigation, a 1959 book by Stanisław Lem
• The Investigation (play), a 1965 play by Peter Weiss

• "Investigations" (Star Trek: Voyager), an episode of the television series Star Trek: Voyager
• Investigation (TV channel), a Canadian French-language specialty channel
• The Investigation (TV series), a 2020 six-part Danish TV series
• Investigation Discovery, a digital cable channel

• "Investigations", a 2009 song by Kevin MacLeod
• Investigate (magazine), a New Zealand current affairs magazine
• Investigation (film), a 2006 Bulgarian drama
• Investigative journalism, the practice of in-depth reporting or analysis
• Temporal Investigations, an agency of the government of the United Federation of Planets in the fictional universe of Star Trek

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• Background investigation, an investigation into an individual's past
• Congressional investigation, an inquiry run by a congressional committee
• Discovery (observation), the act of detecting something new, or something "old" that had been unrecognized as meaningful
• Examination (disambiguation)
• Forensic science, in fields such as accounting, science, engineering and information technology
• Investigator (disambiguation)
• Research

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