Interrogation in the context of "Human intelligence (intelligence gathering)"

An arrest is the act of apprehending and taking a person into custody (legal protection or control), usually because the person has been suspected of or observed committing a crime. After being taken into custody, the person can be questioned further or charged. An arrest is a procedure in a criminal justice system, sometimes it is also done after a court warrant for the arrest.

Police and various other officers have powers of arrest. In some places, a citizen's arrest is permitted; for example in England and Wales, any person can arrest "anyone whom he has reasonable grounds for suspecting to be committing, have committed or be guilty of committing an indictable offence", although certain conditions must be met before taking such action. Similar powers exist in France, Italy, Germany, Austria and Switzerland if a person is caught in an act of crime and not willing or able to produce valid ID.

Criminal investigation is an applied science that involves the study of facts that are then used to inform criminal trials. A complete criminal investigation can include searching, interviews, interrogations, evidence collection and preservation, and various methods of investigation. Modern-day criminal investigations commonly employ many modern scientific techniques known collectively as forensic science.

Criminal investigation is an ancient science that may have roots as far back as c. 1700 BCE in the writings of the Code of Hammurabi. In the code, it is suggested that both the accuser and the accused had the right to present evidence they collected. In the modern era, criminals investigations are most often done by government police forces. Private investigators are also commonly hired to complete or assist in criminal investigations.

Interrogational torture is the use of torture to obtain information in interrogation, as opposed to the use of torture to extract a forced confession, regardless of whether it is true or false. Torture has been used throughout history during interrogation, although it is now illegal and a violation of international law.

Beyond torture's moral repugnance, most experts who study interrogation consider torture an ineffective and counterproductive means of gathering accurate information, because it frequently generates false or misleading information and impairs subsequent information collection.

Hooding is the placing of a hood over the entire head of a prisoner. Hooding is widely considered to be a form of torture; one legal scholar considers the hooding of prisoners to be a violation of international law, specifically the Third and Fourth Geneva Conventions, which demand that persons under custody or physical control of enemy forces be treated humanely. Hooding can be dangerous to a prisoner's health and safety. It is considered to be an act of torture when its primary purpose is sensory deprivation during interrogation; it causes "disorientation, isolation, and dread." According to the International Committee of the Red Cross, hooding is used to prevent a person from seeing, to disorient them, to make them anxious, to preserve their torturer's anonymity, and to prevent the person from breathing freely.

In 1997, the United Nations Committee Against Torture had concluded that hooding constituted torture, a position it reiterated in 2004 after the committee's special rapporteur had "received information on certain methods that have been condoned and used to secure information from suspected terrorists."

34°34′36.48″N 69°17′25.80″E / 34.5768000°N 69.2905000°E / 34.5768000; 69.2905000The Salt Pit and Cobalt were the code names of an isolated clandestine CIA black site prison and interrogation center outside Bagram Air Base in Afghanistan. It was located north of Kabul and was the location of a brick factory prior to the war in Afghanistan. The CIA adapted it for extrajudicial detention.

In the winter of 2005, the Salt Pit became known to the general public because of two incidents. In 2011, the Miami Herald indicated that the Salt Pit was the same facility that Guantanamo Bay detainees referred to as the dark prison—a fact subsequently confirmed in the CIA torture report.

Detention is the process whereby a state or private citizen holds a person by removing or restricting their freedom or liberty at that time.

Detention can be due to (pending) criminal charges against the individual pursuant to a prosecution or to protect a person or property. Being detained does not always result in being taken to a particular area (generally called a detention center), either for interrogation or as punishment for a crime (see prison). Persons can be detained if they are not allowed to leave a specific jurisdiction (a type of travel ban known as an 'exit ban') or if they are prevented from traveling to or from a specific area or region. An individual may be detained due a psychiatric disorder, potentially to treat this disorder involuntarily. They may also be detained for to prevent the spread of infectious diseases such as tuberculosis.