Policing Structures
Most police forces contain subgroups whose job it is to investigate particular types of crime.
In most Western police forces, perhaps the most significant division is between "uniformed" police and detectives. Uniformed police, as the name suggests, wear uniforms, and their jobs involve overt policing operations, traffic control, and more active crime response and prevention. Detectives, by contrast, wear 'business attire' when their job is to more passively investigate serious crimes, usually on a longer-term basis. In the US, larger, urban departments will additionally have 'plain clothes' officers who patrol rougher neighborhoods in unmarked police cars, looking for violent crime as it happens, then arresting those responsible before they can escape. The NYPD Street Crime Unit, now disbanded and replaced with precinct-based Anti-Crime units, is an example of this kind of work, often mistakenly referred to as 'undercover.' While many large US departments have some type of undercover officers, they are rarely identified publicly. An undercover officer is in plainclothes, but he is an officer playing a role, typically a drug buyer, drug seller, hired killer, or other organized crime participant. The officer's family may have no knowledge of his assignment, and the officer works without benefit of his police radio, firearm, or bullet-resistant vest, each of which would betray his true function. For an undercover, this is not the typical police work of arresting criminals. As he is essentially impersonating a criminal, solely in an effort to gather intelligence about criminal activity, he is akin to a spy. Like a spy, an undercover whose identity has been revealed, or is suspected, is almost always in danger of being killed for it. Police departments with undercover officers take great pains to keep their undercovers' names, faces, and even the sounds of their voices a secret. Generally, the work of plainclothes officers, detectives, and undercovers is regarded as more prestigious (than uniformed work) within the police organization (though some of the specialised uniformed squads are also high in status).
Specialised groups exist within the branches either for dealing with particular types of crime (for instance, traffic policing, murder, or fraud) or because of particular specialised skills they have (for instance, diving, operating helicopters, bomb squad, and so on). Most larger jurisdictions also retain specially-trained quasi-military squads armed with small arms for the purposes of dealing with particularly violent situations. These are sometimes called SWAT teams.
Various police agencies
For concepts, see also:
Police methods, services, and tactics
Ethical issues related to police
Notable historical police personalities
For fictional accounts of police work, see also: Crime fiction.
External links