Investigation

Investigation or Investigations may refer to:

Law enforcement

Criminal investigation, the study of facts, used to identify, locate and prove the guilt of an accused criminal
Investigation, the work of a private investigator
Investigation, the work of a detective
Federal Bureau of Investigation, the primary investigative arm of the US Department of Justice
Criminal investigation department, the branch of British Police force to which plain-clothes detectives belong
Griffin Investigations, the most prominent group of private investigators specializing in the gambling industry

Clinical trial, an investigation conducted to collect data for new drugs or devices
Investigational New Drug, category in a USFDA program
Tests and scans done to help with the diagnosis or management of a disease (see: medical test), although investigation may also refer to the general diagnostic process

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

Investigation (film), a 2006 Bulgarian drama
The Investigation, 1959 book by Stanisław Lem
The Investigation (play), 1965 play by Peter Weiss
Investigation (TV channel), a Canadian French-language specialty channel
Investigation Discovery, a digital cable channel
Investigative journalism, the practice of in-depth reporting or analysis
"Investigations" (Star Trek: Voyager), the 36th episode of the television series Star Trek: Voyager
Temporal Investigations, agency of the government of the United Federation of Planets in the fictional universe of Star Trek