investigation

Investigation or Investigations may refer to:

==Law enforcement== 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