Fourth Amendment

“The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.” 

- U.S. Const. amend. IV. 

NACDL seeks to ensure that the Fourth Amendment remains a vibrant protection against encroachments on the privacy of the individual through litigation and public advocacy. The Fourth Amendment is the appropriate starting point for assessing the limits on government intrusion into one’s privacy, and its protections must continue to thrive in the digital age. The Fourth Amendment and its guarantees should not turn on the medium used to transmit private information, nor on how the information is stored. NACDL strives to guarantee that evidence obtained in violation of the Fourth Amendment is excluded in a court of law.

NEW! NACDL REPORT: Mail Cover Surveillance: Problems and Recommendations 


News Of Interest

"New York Police Should Revise Body Camera Rules, Report Says," by J. David Goodman, New York Times, July 30, 2015.

"N.D.Cal.: Gov’t cell site location information collection and analysis requires SW," by Hall,, July 31, 2015.

"Judge: Cellphone Tracking Requires a Warrant," by Ross Todd, The Recorder, July 30, 2015.

"Activists send the Senate 6 million faxes to oppose cyber bill," by Stephanie Condon, CBS News, July 30, 2015.

"Is the 4th Amendment Dead in Cyberspace?," by Traci Mitrano, Inside Higher Ed, July 29, 2015.

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