The power of arrest is a mandate given to certain members of a society by the central authority that allows them to remove a criminal or suspected criminal's liberty.
Arrest usually leads to
custody. In almost all jurisdictions, certain people are specifically assigned to
law enforcement (the
police), and these people use their power of arrest frequently. However, in many countries, almost any free member of the society can (at least in theory) arrest someone; in this context, when used by an "ordinary man on the street", it is usually called a
citizen's arrest.
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An order attached to some injunctions to allow the police
to arrest a person who has broken the terms of the order