Investigation

Investigation or Investigations may refer to:

Law enforcement

 * 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

Medicine

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

Science and maths

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

Literature

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

Television

 * "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

Other uses in arts, entertainment, and media

 * 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