Also known as: law enforcement officer · law-enforcement officers · law enforcement officers · LEO
Written by attorneys · grounded in primary & secondary sources — see below
A person whose duty is to enforce the laws and preserve the peace. Federal rules further specify that a federal law enforcement officer is a government agent engaged in enforcing criminal laws and authorized by the Attorney General to request search warrants.
Lars Lindstrom, a county sheriff, receives a directive from federal authorities to perform handgun purchaser background checks under a new federal program. He refuses, citing limits on federal power over state officers. The federal government cannot compel him to administer the program.
Leo Lynch, a detective, arrests a suspect and begins questioning without providing warnings about rights. The suspect later seeks to suppress statements made during the interrogation. The absence of warnings renders the statements inadmissible at trial.
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Luna Lang and other federal agents enter a residence without a warrant to search for narcotics. The resident sues the agents for violating constitutional rights. The claim proceeds directly against the officers for damages.
Leonard Lowe, an officer, testifies under a grant of immunity before a grand jury. Prosecutors later attempt to use that testimony against him in a criminal case. The prior immunity bars any use of the compelled statements.
Lance Lee, a police officer, shoots a fleeing burglary suspect who poses no threat of violence. The suspect's estate sues, alleging excessive force. The use of deadly force against an unarmed, non-dangerous suspect violates constitutional standards.
Lucy Liu, a city police officer, arrests a resident for possessing a handgun in the home under a local ordinance. The resident challenges the ordinance as unconstitutional. The Second Amendment, incorporated against the states, limits the officer's enforcement authority.
Yes. The Supreme Court has held that the federal government may not command state or local officers to administer or enforce federal regulatory programs, as this violates the Tenth Amendment.
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Under federal rules, a law enforcement officer is treated as a government witness at a suppression hearing, triggering disclosure obligations for prior statements.
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A federal law enforcement officer may request a search warrant when engaged in enforcing criminal laws and authorized by the Attorney General.
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Yes. Knowingly providing false information to a law enforcement officer with the purpose of implicating another person is a misdemeanor under the Model Penal Code.
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…S. 547, 562 (1892). We are satisfied that all the principles embodied in the privilege apply to informal compulsion exerted by law-enforcement officers during in-custody questioning. An individual swept from familiar surroundings into police custody, surrounded by antagonistic forces, and subjected to the techniques of persuasion described…