• Investigation, the work of a
detective • Investigation, the work of a
private investigator • Investigation, the work of an
insurance adjuster • Investigation, to identify the cause of an
explosion • Investigation, to identify the cause of a
traffic collision,
railway accident,
airplane crash, or other transportation accident •
Criminal investigation, the study of facts, used to identify, locate and prove the guilt or innocence of an accused person or organization •
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 •
Fire investigation, analysis of fire-related incidents and to determine if arson was involved •
Tax investigation ==Medicine==