Interrogation (also called questioning) generally means formally or informally interviewing a person to gain needed information of some kind. Interrogations are used by military organizations, intelligence agencies and law enforcement agencies worldwide. Sometimes the interrogated person is suspected of committing a crime or thought to have a reason to hide the information. The questioner in criminal and military interrogations is often an officer trained in different interrogation techniques. Depending on how they view the person being questioned or the purpose of the interrogation, the methods used may vary widely. For example: