- Crime : Acts or omissions that are made offences against the law and which are prosecuted by the State.
- Emergency services : Add brief definition or description
- Law : Body of rules of conduct of binding legal force and effect, prescribed, recognized, and enforced by a controlling authority.
- Law enforcement : Add brief definition or description
- Arrest : Add brief definition or description
- Detective : A person, usually employed in a state agency and sometimes by private parties, to investigate and solve crimes.
- International extradition : The process by which one country asks the overt judicial system of another country to surrender, to the first country, a person resident in the second, to face criminal proceedings in the first country
- Interpol : Add brief definition or description
- Incident Command System : An increasingly worldwide set of procedures and doctrines for operational response to emergencies requiring response from different organizations, ranging from multiple units of the same local fire department or police force, to major disasters covering large regions and requiring national or international resources
- Interrogation : A systematic process of direct questioning, of a person in detention or otherwise under the control of the interrogator, to obtain reliable information to satisfy criminal investigation or human-source intelligence requirements, within the scope of relevant law and policy
In different countries
- Policing in Canada : Add brief definition or description
- Policing in the United Kingdom : Add brief definition or description
- Policing in the United States : Add brief definition or description
- New York Police Department : Add brief definition or description
- Royal Canadian Mounted Police : Canada's Federal police service, a service with paramilitary roots.
- Scotland Yard : The traditional name of the headquarters of the London Metropolitan Police.
Role in counterterrorism
- Counterterrorism : A range of activities that prevent attempted terrorism well before an actual act is close to being executed, including killing or capturing terrorists; complements and can include anti-terrorism, or measures taken to minimize the impact of an attempted or completed act; counterterrorism proper is "enemy centric" rather than counterinsurgency, which is "people-centric"
- Hassan Abbas : International law specialist at the Institute for Social Policy and Understanding (ISPU); Belfer Center Former Research Fellow, Project on Managing the Atom/International Security Program, 2005–2009; research interests in Pakistan’s nuclear program, including and the A.Q. Khan controversy; religious extremism in South and Central Asia; and “Islam and the West.”
- David Kilcullen : A former Australian infantry officer with a doctorate in the study of insurgency and history, he is an advisor on counterinsurgency to the Australian and U.S. governments. His models draw a sharp distinction between the tactic of terror, and the conduct of wars that make use of that tactic. Board of Advisors, Center for a New American Security
- Civil rights : Rights considered inherent to members of a society, the arbitrary deprivation of which is subject to enforcement action
- Terrorism : An act, with targets including civilians or civilian infrastructure, intended to create an atmosphere of fear in order to obtain a political objective.
- Uniform : An outfit which is prescribed or ceremonial based on one's position, employment, membership in an organization or societal status.
- Plainclothes : The wearing of civilian clothing, by police, when uniform might be expected, as with detectives; there are specific rules in the Third Common Article of the Geneva Conventions about combatants wearing distinctive insignia