
In the United States, non-law enforcement officers can be temporarily deputized by law enforcement officers to carry out law enforcement functions under their supervision and direction. This is known as posse comitatus, which means power of the county in Latin. The practice has a long history, dating back to 9th-century England and the campaigns of Alfred the Great, and has been used in the US since the early decades of the country's existence. While the use of posse comitatus has decreased over time, especially in urban areas with large professional police departments, it is still occasionally used, particularly in rural areas. The legality of deputization varies by state, with most states having specific circumstances under which non-law enforcement officers can be temporarily granted law enforcement powers.
| Characteristics | Values |
|---|---|
| Can non-law enforcement be deputized? | In most states, law enforcement officers can deputize a non-law enforcement officer to carry out law enforcement functions under the supervision of a law enforcement officer. |
| Who can deputize non-law enforcement officers? | Sheriffs, police officers, the Attorney General, and the Administrator of the Transportation Security Administration. |
| Who can be deputized? | Civilians, citizens, and federal investigators and prosecutors. |
| What can deputized individuals do? | Detain suspects, make arrests, execute search warrants, and question suspects. |
| What is a group of deputized individuals called? | A posse. |
| What is the history of the practice? | The posse comitatus (power of the county) dates back to 9th-century England and was used to suppress lawlessness, defend the people, and protect property and public welfare. In the early United States, it was used to enforce slavery. |
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What You'll Learn
- Law enforcement officers can deputize non-law enforcement officers to carry out law enforcement functions under their supervision
- The use of federal-state task forces is a widespread practice in contemporary law enforcement
- Congress could expressly empower federal investigators and prosecutors to be cross-designated as state law enforcement officials
- The Attorney General could enter into deputization or cross-designation agreements with state officials
- In some states, sheriffs and other law enforcement agencies have called their civilian auxiliary groups posses

Law enforcement officers can deputize non-law enforcement officers to carry out law enforcement functions under their supervision
In the United States, law enforcement officers can deputize non-law enforcement officers to carry out law enforcement functions under their supervision. This practice, known as "deputization," is typically done on an incident-by-incident basis and is more common in rural or frontier areas with smaller police departments. For example, a sheriff responding to a bar fight who needs to arrest multiple people may deputize a bystander to detain one of the suspects until more law enforcement personnel arrive. This is allowed under most state laws, including Colorado Revised Statutes § 16-3-202, which states that a "peace officer making an arrest may command the assistance of any person who is in the vicinity."
The exact details of deputization vary from state to state, and the authority granted may differ depending on the situation. For instance, the power to deputize someone to kill a dying deer after a car accident may be covered under a different statutory section than the power to deputize someone to make an arrest. In some states, particularly in the Western US, sheriffs and other law enforcement agencies have historically referred to their civilian auxiliary groups as "posses." While the use of posses has declined since the early 20th century, especially in urban areas, it has been associated with civil unrest, as seen in the Lattimer Massacre of 1897.
Deputization can also occur between federal and state law enforcement agencies. Federal-state task forces are a widespread practice that allows for cooperation and cross-designation of authorities to investigate and prosecute violations of state and federal law. However, there is ongoing discussion about the need for federal legislation to expressly approve and encourage deputization, providing clarity and eliminating doubts about the authority of federal agents in purely state law matters.
It is important to note that while law enforcement officers can grant certain authority to civilians through deputization, this does not always constitute a transfer of all law enforcement powers. For example, in some cases, police may grant permission to civilians to perform specific tasks, such as shooting a deer out of season, without officially deputizing them or granting them special powers.
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The use of federal-state task forces is a widespread practice in contemporary law enforcement
In the United States, non-law enforcement officers can be deputized in certain situations. Most states have statutory circumstances under which certain kinds of law enforcement officers can deputize a non-law enforcement officer to carry out law enforcement functions under the supervision of a law enforcement officer. For example, a sheriff responding to a bar fight could authorize a bystander to detain a suspect until additional law enforcement personnel arrive.
The success of U.S. Marshals task force initiatives has led to the formation of permanent fugitive task forces, as well as ad-hoc task forces in response to unique cases that pose an immediate threat to the public. The U.S. Marshals Service oversees the nation's regional fugitive task forces, which were established under the Presidential Threat Protection Act of 2000. These task forces have partnership agreements with numerous federal, state, and local agencies and have successfully apprehended a significant number of fugitives, including violent offenders.
The use of federal-state task forces offers an alternative to new federal criminal legislation in tackling violent crimes. This cooperation includes the cross-designation of federal authorities to investigate and prosecute alleged violations of state law and vice versa. However, there have been calls for Congress to expressly authorize federal investigators and prosecutors to be cross-designated as state law enforcement officials, providing clarity and eliminating any potential doubts or claims of unauthorized actions.
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Congress could expressly empower federal investigators and prosecutors to be cross-designated as state law enforcement officials
In the United States, federal–state task forces are a widespread practice in contemporary law enforcement. This practice involves the cross-designation of federal authorities to investigate and prosecute alleged violations of state law, and vice versa. However, there is a lack of clarity regarding the authorization of federal law enforcement officers to make arrests or execute search warrants solely for state law crimes.
To address this issue, Congress could expressly empower federal investigators and prosecutors to be cross-designated as state law enforcement officials. This would provide explicit authorization for federal law enforcement officers to act under state law and pursue offenders in state courts. It would also send a powerful signal of congressional and executive approval of deputization as a valuable law enforcement option.
By expressly authorizing federal investigators and prosecutors as state law enforcement officials, Congress can eliminate any doubt regarding the authorization of federal agents in state law matters. This would resolve questions that arise when federal agents pursue individuals who have violated only state law, providing clarity on the investigative and prosecutorial powers of federal authorities in these cases.
Furthermore, such legislation would strengthen the collaboration between federal, state, and local law enforcement agencies. It would encourage information sharing and the utilization of federal resources and expertise to support state and local investigations. This collaborative approach has been recognized as an effective strategy in combating terrorism and tracking down suspects, and addressing violent crimes.
In summary, by expressly empowering federal investigators and prosecutors to be cross-designated as state law enforcement officials, Congress can enhance the cooperation and effectiveness of law enforcement agencies across different levels of government. This legislative action would provide clear authorization, resolve jurisdictional ambiguities, and improve the collective efforts in fighting crime and ensuring public safety.
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The Attorney General could enter into deputization or cross-designation agreements with state officials
The authority for such cooperation already exists, and Congress could further empower federal investigators and prosecutors to be cross-designated as state law enforcement officials. This would provide clarity and eliminate any concerns about federal agents creating issues during the prosecution of a case or claims of unauthorized use of federal funds.
The Attorney General, as the head of the Department of Justice and chief law enforcement officer of the Federal Government, could play a crucial role in facilitating these agreements. By pursuing such agreements with state authorities, the Attorney General would enable federal law enforcement officials to be designated with state law enforcement authority, enhancing collaboration and effectiveness in combating crimes.
However, concerns have been raised about the potential for abuse of power by cross-deputized officers. There have been instances where cross-deputized officers have violated the constitutional rights of Americans, and courts have found them insulated from accountability due to their cross-deputization status. This highlights the importance of careful consideration and oversight in the implementation of such agreements to prevent any misuse of authority.
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In some states, sheriffs and other law enforcement agencies have called their civilian auxiliary groups posses
In the United States, law enforcement operates primarily through 17,985 governmental police agencies, including local police departments, county sheriff's offices, state troopers, and federal law enforcement agencies. These agencies are responsible for investigating suspected criminal activity, making arrests, executing searches, and questioning suspects.
In contemporary law enforcement, the use of federal-state task forces is a widespread practice, and federal-state cooperation is authorized in certain circumstances. For example, federal investigators and prosecutors can be cross-designated as state law enforcement officials to investigate and prosecute alleged violations of state law, and vice versa. However, there have been calls for federal legislation to expressly approve and encourage the deputization of federal agents as a valuable law enforcement option, providing clarity and eliminating any concerns about unauthorized use of federal funds.
Additionally, most states have statutory circumstances under which certain law enforcement officers can deputize non-law enforcement officers to carry out specific functions under supervision. For instance, a sheriff responding to a bar fight may authorize a patron to detain a suspect until additional law enforcement personnel arrive.
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Frequently asked questions
Yes, non-law enforcement officers can be deputized. Most states have statutory circumstances under which certain kinds of law enforcement officers can deputize a non-law enforcement officer to carry out law enforcement functions under the supervision of a law enforcement officer.
A sheriff responding to a bar fight with several people who need to be arrested could authorize a bouncer or patron at the bar to detain a suspect until additional law enforcement personnel arrive.
The posse comitatus (from the Latin for "power of the county"), often shortened to posse, is a group of people summoned by a conservator of the peace (such as a sheriff) to suppress lawlessness, defend the people, or protect the place, property, and public welfare. The concept dates back to 9th-century England and the campaigns of Alfred the Great.











































