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The blue wall of silence, also blue code and blue shield, are terms used to denote the informal code of silence among police officers in the United States not to report on a colleague's errors, misconducts, or crimes, especially as related to police brutality in the United States.
Suicide by cop (abbreviated as: SbC [1] ), also known as suicide by police or law-enforcement-assisted suicide, [2] is a suicide method in which a suicidal individual deliberately behaves in a threatening manner, with intent to provoke a lethal response from a public safety or law enforcement officer [3] to end their own life.
A police code is a brevity code, usually numerical or alphanumerical, used to transmit information between law enforcement over police radio systems in the United States. Examples of police codes include "10 codes" (such as 10-4 for "okay" or "acknowledged"—sometimes written X4 or X-4), signals, incident codes, response codes, or other status ...
The all-points bulletin was used by police to communicate messages to other police officers over long distances. In the field of policing, an all-points bulletin contains an important message about a suspect or item of interest, which officers may be in search for.
The PEACE method of investigative interviewing is a five stage process in which investigators try to build rapport and allow a criminal suspect to provide their account of events uninterrupted, before presenting the suspect with any evidence of inconsistencies or contradictions.
Ten-codes, officially known as ten signals, are brevity codes used to represent common phrases in voice communication, particularly by law enforcement and in citizens band (CB) radio transmissions. The police version of ten-codes is officially known as the APCO Project 14 Aural Brevity Code. [1]
It consists of a signalling protocol such as the use of abbreviated codes like the CB radio ten-code, Q codes in amateur radio and aviation, police codes, etc., and jargon. Some elements of voice procedure are understood across many applications, but significant variations exist.
Emergency service response codes are predefined systems used by emergency services to describe the priority and response assigned to calls for service. Response codes vary from country to country, jurisdiction to jurisdiction, and even agency to agency, with different methods used to categorize responses to reported events.
The police must apply for a warrant beforehand to legally eavesdrop on a conversation, which requires that it is expected to reveal evidence to a crime. State agents may record conversations, but must obtain a warrant to use them as evidence in court.
Police radio is a radio system used by police and other law enforcement agencies to communicate with one another. Police radio systems almost always use two-way radio systems to allow for communications between police officers and dispatchers.