Arrest

Alarm systems are mechanisms that protect physical or digital infrastructure by sending an alert signal when unauthorized access to the infrastructure is detected. The alert signal can lead to the rapid intervention of security guards or law enforcement in order to investigate the situation.

Detection dogs are dogs that have been trained by an adversary to detect certain substances, primarily through their sense of smell.

Guards (also known as security guards) are people employed by an adversary to protect buildings or other physical infrastructure.

A house raid is a surprise search of a residence conducted by an adversary. An adversary often conducts a house raid early in the morning when the occupants of the residence are asleep and taken by surprise.

An ID check (short for identity check) is the process by which the State verifies a person's identity by asking them for their personal information, requiring them to produce a government-issued ID document, or taking their biometric information (face photograph, fingerprints, DNA) and comparing it against a database. An ID check can be a pretext for questioning and pressuring, and can be followed by a search of the person's belongings.

Increased police presence is the process by which the police increase their presence in a particular place and time for two reasons: to intimidate, and to improve their options for intervention and their responsiveness.

International cooperation is the exchange of information between law enforcement and intelligence agencies of different countries.

Police patrols are the law enforcement practice of traversing a particular area to monitor and secure it. Police may conduct patrols either as a routine operation or in response to a perceived threat in an area.