A police officer (also called policeman or policewoman, cop, officer or constable) is a warranted law employee of a police. In most countries, police officer is a generic term not specifying a particular rank. In some, the use of the rank officer is legally reserved for military personnel.
Police officers are generally charged with the apprehension of Suspect and the prevention, detection, and reporting of crime, protection and assistance of the general public, and the maintenance of public order. Police officers may be sworn to an Police oath, and have the power to arrest people and detain them for a limited time, along with other duties and powers. Some officers are trained in special duties, such as counter-terrorism, surveillance, child protection, VIP protection, civil law enforcement, and investigation techniques into major crime including fraud, rape, murder, and drug trafficking. Although many police officers wear a corresponding uniform, some police officers are plain-clothed in order to pass themselves off as members of the public. In most countries police officers are given exemptions from certain laws to perform their duties. For example, an officer may use force if necessary to arrest or detain a person when it would ordinarily be assault. In some countries, officers can also violate traffic laws to perform their duties.
Police officers are those empowered by government to enforce the laws it creates. In The Federalist collection of articles and essays, James Madison wrote: "If men were angels, no Government would be necessary". These words apply to those who serve government, including police. A common nickname for a police officer is "cop"; derived from the verb sense "to arrest", itself derived from "to grab". Thus, "someone who captures", a "copper", was shortened to just "cop". It may also find its origin in the Latin capere, brought to English via the Old French caper.
In the majority of Western world legal systems, the major role of the police is to maintain order, keeping the peace through surveillance of the public, and the subsequent reporting and apprehension of suspected violators of the law. They also function to discourage crimes through high-visibility policing, and most police forces have an investigative capability. Police have the legal authority to arrest and detain, usually granted by magistrates. Police officers also respond to calls for service, along with routine community policing.
Police are often used as an emergency service and may provide a public safety function at large gatherings, as well as in Emergency, disasters, search and rescue operations, and traffic collisions. To provide a prompt response in emergencies, the police often coordinate their operations with Fire department and emergency medical services. In some countries, individuals serve jointly as police officers as well as (creating the role of fire police). In many countries, there is a common emergency telephone number that allows the police, firefighters, or medical services to be summoned to an emergency. Some countries, such as the United Kingdom, have introduced command procedures for use in major emergencies or disorder. In the UK, The Gold Silver Bronze command structure is a system set up to improve communications between ground-based officers and the control room. Typically, a Bronze Commander would be a senior officer on the ground, coordinating the efforts in the center of the emergency, Silver Commanders would be positioned in an 'Incident Control Room' erected to improve better communications at the scene, and a Gold Commander would be in overall command in the Control Room.
Police are also responsible for reprimanding minor offenders by issuing summons which typically may result in the imposition of fines, particularly for violations of traffic law. Traffic enforcement is often, but not always, accomplished by police officers on police motorcycles—called motor officers, these officers refer to the Motorcycle they ride on duty as simply motors. Police are also trained to assist persons in distress, such as motorists whose cars have broken down and people experiencing a medical emergency. Police are typically trained in basic first aid such as CPR.
Some are commissioned as law enforcement officers and carry out a law-enforcement role within and other back-country wilderness and recreational areas, whereas military police perform law enforcement functions within the military.
Dependent upon each agency, but generally after completing two years of service, officers may apply for specialist positions, such as detective, police dog handler, mounted police officer, motorcycle officer, water police officer, or firearms officer (in countries where police are not routinely armed).
In some countries, including Singapore, police ranks are supplemented through conscription, similar to national service in the military. Qualifications may thus be relaxed or enhanced depending on the target mix of conscripts. Conscripts face tougher physical requirements in areas such as eyesight, but minimum academic qualification requirements are less stringent. Some join as volunteers, again via differing qualification requirements.
In some towns of Fairfield County, Connecticut, Police officers have earned $178,000-$312,000 with overtime. Similar pay rates have made reports for New Jersey and Oakland, California police officers. In 2023, a Senior Deputy with The San Francisco Sheriff's Office earned a top salary of double those in Connecticut.
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