Investigator may refer to:

Occupations

Government and law

* Detective, a person who investigates crimes, can be a rank and job in a police department, state or federal employee, or a civilian called a private detective * Inspector, a police rank in many countries

Science and academia

Clinical investigator A clinical investigator involved in a clinical trial is responsible for ensuring that an investigation is conducted according to the signed investigator statement, the investigational plan, and applicable regulations; for protecting the rights, safe ...

, an investigator involved in a clinical trial *

New investigator Certain scholarly funding agencies make a distinction between investigators and new investigators. New investigators would be evaluated in a different way when competing for funding with more seasoned researchers, or they would be able to access ...

, a designation for less experienced researchers *

Principal investigator In many countries, the term principal investigator (PI) refers to the holder of an independent grant and the lead researcher for the grant project, usually in the sciences, such as a laboratory study or a clinical trial. The phrase is also often us ...

, a researcher in a research project

Other fields

Private investigator A private investigator (often abbreviated to PI and informally called a private eye), a private detective, or inquiry agent is a person who can be hired by individuals or groups to undertake investigatory law services. Private investigators of ...

, a person who does not work for the police or government, but who undertakes investigations as a subcontractor * Ghost hunter or other paranormal investigator *

Psychic detective A psychic detective is a person who investigates crimes by using purported paranormal psychic abilities. Examples have included postcognition (the paranormal perception of the past), psychometry (information psychically gained from objects), ...

, a person who investigates crimes by using purported psychic abilities * In Mormon missionary terminology, an investigator refers to someone who is investigating the LDS Church. Generally, a non-member who is taking the missionary discussions.

Media

* ''Investigator'' (magazine), journal of the Geelong Historical Society *''

The Investigator ''The Investigator'' (1954) was a radio play written by Reuben Ship and first broadcast by the Canadian Broadcasting Corporation (CBC) on May 30 of that year. The play lampooned the actions of the U.S. House Committee on Un-American Activities ...

'', a 1954 Canadian radio play * ''The Investigator'' (TV pilot), a 1973 British TV pilot *'' The Investigator: A British Crime Story,'' a British television documentary

Ships

* HMS ''Investigator'', name of ships in the Royal Navy * RV ''Investigator'', Australian research vessel built in 2013

Places

Australia

Investigator Group The Investigator Group is an archipelago in South Australia that consists of Flinders Island and five island groups located off the western coast of the Eyre Peninsula. It is named after by her commander, Matthew Flinders when he explore ...

, archipelago in South Australia *

Investigator Marine Park __NOTOC__ Investigator Marine Park is a marine protected area in the Australian state of South Australia located in the state's coastal waters in its west adjoining the west coast of Eyre Peninsula and islands in the Investigator Group respective ...

, a marine protected area in South Australia *

Investigator Strait Investigator Strait is a body of water in South Australia lying between the Yorke Peninsula, on the Australian mainland, and Kangaroo Island. It was named by Matthew Flinders after his ship, HMS ''Investigator'', on his voyage of 1801–1802 ...

, a strait in South Australia