A law enforcement officer (LEO), or police officer or peace officer in North American English, is a public-sector or private-sector employee whose duties primarily involve the enforcement of laws, protecting life & property, keeping the peace, and other public safety related duties. Law enforcement officers are designated certain powers & authority by law to allow them to carry out their responsibilities. Modern legal codes use the term peace officer (or in some jurisdictions, law enforcement officer) to include every person vested by the legislating state with law enforcement authority. Traditionally, anyone "sworn, badged, and armable" who can arrest, or refer such arrest for a criminal prosecution. Security officers may enforce certain laws and administrative regulations, which may include detainment or apprehension authority, including arresting in some jurisdictions. Peace officers may also be able to perform all duties that a law enforcement officer is tasked with, but may or may not be armed with a weapon. The term peace officer in some jurisdictions is interchangeable with law enforcement officer or police officer, but in others peace officer is a totally separate legal designation with quasi-police powers.

Canada

In Canada, the Criminal Code (R.S., c. C-34, s. 2.) defines a peace officer as: "Peace officer includes Section (b) allows for designation as a peace officer for a member of the Correctional Service of Canada under the following via the Corrections and Conditional Release Act: "*10. The Commissioner may in writing designate any staff member, either by name or by class, to be a peace officer, and a staff member so designated has all the powers, authority, protection and privileges that a peace officer has by law in respect of Also, provincial legislatures can designate a class of officers (i.e. Conservation Officers, Park Rangers and Commercial Vehicle Safety and Enforcement) to be peace officers.

United States

United States federal law enforcement personnel include but are not limited to the following: In addition, many departments in the U.S. Federal Government contain Inspector Generals who are able to appoint criminal investigators to work under them. For an exhaustive list of all federal law enforcement, you can find it on Federal law enforcement in the United States.

Arizona

Arizona Revised Statutes defines a peace officer in Title 13, Section 105, as "any person vested by law with a duty to maintain public order and make arrests and includes a constable." Title 1, Section 215(27) enumerates those who are peace officers in the State of Arizona. It includes: Arizona Revised Statutes 41-1823 states that except for duly elected or appointed sheriffs and constables, and probation officers in the course of their duties, no person may exercise the authority or perform the duties of a peace officer unless he is certified by the Arizona peace officers standards and training board.

California

Sections 830 through 831.7 of the California Penal Code list persons who are considered peace officers within the State of California. Peace officers include, in addition to many others, Most peace officers have jurisdiction throughout the state, but many have limited powers outside their political subdivisions. Some peace officers require special permission to carry firearms. Powers are often limited to the performance of peace officers' primary duties (usually, enforcement of specific laws within their political subdivision); however, most have power of arrest anywhere in the state for any public offense that poses an immediate danger to a person or property. A private person (i.e., ordinary citizen) may arrest another person for an offense committed in the arresting person's presence, or if the other person has committed a felony whether or not in the arresting person's presence (Penal Code § 837), though such an arrest when an offense has not occurred leaves a private person open to criminal prosecution and civil liability for false arrest. A peace officer may: Persons are required to comply with certain instructions given by a peace officer, and certain acts (e.g., battery) committed against a peace officer carry more severe penalties than the same acts against a private person. It is unlawful to resist, delay, or obstruct a peace officer in the course of the officer's duties (Penal Code § 148 [a][1] ).

New York State

New York State grants peace officers very specific powers under NYS Criminal Procedure Law, that they may make warrantless arrests, use physical and deadly force, and issue summonses under section 2.20 of that law. There is a full list of peace officers under Section 2.10 of that law. Below are some examples.

Texas

Texas Statutes, Code of Criminal Procedure, Art. 2.12, provides: "Art. 2.12, WHO ARE PEACE OFFICERS. The following are peace officers: