law enforcement officer (LEO) | Definition

Doc's CJ Glossary by Adam J. McKee
Course: Introduction / Policing

A Law Enforcement Officer (LEO) is a public official who is authorized to enforce laws, investigate crimes, and maintain public order and safety.


A Law Enforcement Officer (LEO) serves as a pillar of the community. An LEO has the power to enforce laws, investigate crimes, and maintain order. They work tirelessly to keep our society safe and secure. Their role is critical. Without these brave men and women, chaos and lawlessness would reign.

Different types of LEOs are found across various agencies. These agencies can be local, state, or federal entities. No matter their agency, their primary responsibility remains the same. They uphold the law and protect the citizens within their jurisdiction.

Examples of Law Enforcement Officers

There are many types of LEOs, each having specific duties and responsibilities. Let’s explore some examples.

Police Officers: The most common type of LEOs are police officers. They serve within local or state police departments. They respond to emergency calls, patrol neighborhoods, and enforce laws. They often are the first responders in crises.

Sheriff’s Deputies: Sheriff’s deputies work for a county sheriff’s office. They enforce local and state laws in areas without a dedicated police department. Their jurisdiction typically covers the entire county.

State Troopers: State troopers enforce state laws primarily on highways and other state-owned properties. They work for the state highway patrol. They often deal with traffic incidents and highway safety.

Federal Agents: Federal agents are LEOs working for federal agencies. They include officers from the Federal Bureau of Investigation (FBI), the Drug Enforcement Administration (DEA), and the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF). Federal agents enforce federal laws and investigate federal crimes.

The Authority of Law Enforcement Officers

LEOs are granted authority by the government. This authority allows them to enforce laws and investigate crimes. Before becoming an LEO, individuals must pass rigorous training and various exams. They also undergo thorough background checks.

Once they begin working as officers, they uphold high standards of conduct. They are held accountable for their actions. Misconduct or abuse of power is not tolerated. Their authority must be used responsibly and ethically.

General Context

The term “law enforcement” is often used broadly to refer to the entire system that upholds and enforces laws. This system includes not only LEOs but also the courts, prisons, and other agencies that work together to maintain social order and administer justice.

Each part of the law enforcement system plays a vital role. LEOs are the frontline workers enforcing the law and ensuring public safety. Courts interpret laws and administer justice. Prisons and corrections facilities enforce punishments and work to rehabilitate offenders.

In conclusion, a Law Enforcement Officer is a public servant who dedicates their life to upholding the law, protecting citizens, and maintaining public order. They work in a system alongside other agencies to ensure a safe and orderly society. Their work is demanding, but it’s essential for a peaceful community.


[ Glossary ]

Last Modified: 05/29/2023

2 thoughts on “law enforcement officer (LEO) | Definition

  1. LEOs have the authority to investigate crimes, make arrests, and uphold the law within their jurisdiction. They play a crucial role in maintaining law and order and protecting the rights and safety of the public.

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