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Criminal Procedure Commons

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Full-Text Articles in Criminal Procedure

A Shattered Looking Glass: The Pitfalls And Potential Of The Mosaic Theory Of Fourth Amendment Privacy, David C. Gray, Danielle Keats Citron Jan 2013

A Shattered Looking Glass: The Pitfalls And Potential Of The Mosaic Theory Of Fourth Amendment Privacy, David C. Gray, Danielle Keats Citron

Faculty Scholarship

On January 23, 2012, the Supreme Court issued a landmark non-decision in United States v. Jones. In that case, officers used a GPS-enabled device to track a suspect’s public movements for four weeks, amassing a considerable amount of data in the process. Although ultimately resolved on narrow grounds, five Justices joined concurring opinions in Jones expressing sympathy for some version of the “mosaic theory” of Fourth Amendment privacy. This theory holds that we maintain reasonable expectations of privacy in certain quantities of information even if we do not have such expectations in the constituent parts. This Article examines and …


The Davis Good Faith Rule And Getting Answers To The Questions Jones Left Open, Susan Freiwald Dec 2012

The Davis Good Faith Rule And Getting Answers To The Questions Jones Left Open, Susan Freiwald

Susan Freiwald

The Supreme Court’s decision in United States v. Jones clearly established that use of GPS tracking surveillance constitutes a search under the Fourth Amendment. But the Court left many other questions unanswered about the nature and scope of the constitutional privacy right in location data. A review of lower court decisions in the wake of Jones reveals that, rather than begin to answer the questions that Jones left open, courts are largely avoiding substantive Fourth Amendment analysis of location data privacy. Instead, they are finding that officers who engaged in GPS tracking and related surveillance operated in good faith, based …