Law Commons^™

The Mosaic Theory In Fourth Amendment Jurisprudence: The Last Bastion Of Privacy In A Camera-Surveilled World, Auggie Alvarado

St. Mary's Law Journal

No abstract provided.

You Can’T Teach Old Katz New Tricks: It’S Time To Revitalize The Fourth Amendment, Jeremy Connell

University of Miami Law Review

For over half a century, the Court’s decision in Katz v. United States has been the lodestar for applying the Fourth Amendment. The Katz test has produced a litany of confusing and irreconcilable decisions in which the Court has carved exceptions into the doctrine and then carved exceptions into the exceptions. These decisions often leave lower courts with minimal guidance on how to apply the framework to new sets of facts and leave legal scholars and commenters befuddled and frustrated with the Court’s explanations for the rulings. The Court’s decision in Carpenter v. United States represents the apex of Katz’s …

Putting Together The Pieces: The Mosaic Theory And Fourth Amendment Jurisprudence Since Carpenter, Ben Vanston

West Virginia Law Review

No abstract provided.

Facebook, Crime Prevention, And The Scope Of The Private Search Post-Carpenter, Connor M. Correll

Georgia Law Review

The Fourth Amendment of the U.S. Constitution protects people “against unreasonable searches and seizures.” The private search doctrine provides a notable exception to the Fourth Amendment, providing that the government may reconstruct a search previously performed by a private party without first obtaining a warrant. The U.S. Supreme Court developed the private search doctrine prior to the advent of the internet; however, modern technology has changed the way that individuals live. What was once done entirely in private is now done alongside ever-present third parties, such as cell phones and virtual assistants.

Facebook and other social media sites complicate Fourth …

A Third-Party Doctrine For Digital Metadata, H. Brian Holland

Faculty Scholarship

For more than four decades, the third-party doctrine was understood as a bright-line, categorical rule: there is no legitimate privacy interest in any data that is voluntarily disclosed or conveyed to a third party. But this simple rule has dramatic effects in a world of ubiquitous networked computing, mobile technologies, and the commodification of information. The digital devices that facilitate our daily participation in modern society are connected through automated infrastructures that are designed to generate vast quantities of data, nearly all of which is captured, utilized, and stored by third-party service providers. Under a plain reading of the third-party …

In General Public Use: An Unnecessary Test In Fourth Amendment Searches Using Advanced Sensing Technology, Mike Petridis

Touro Law Review

No abstract provided.

Justice Sonia Sotomayor: The Court’S Premier Defender Of The Fourth Amendment, David L. Hudson Jr.

Law Faculty Scholarship

This essay posits that Justice Sonia Sotomayor is the Supreme Court’s chief defender of the Fourth Amendment and the cherished values it protects. She has consistently defended Fourth Amendment freedoms—in majority, concurring, and especially in dissenting opinions. Part I recounts a few of her majority opinions in Fourth Amendment cases. Part II examines her concurring opinion in United States v. Jones. Part III examines several of her dissenting opinions in Fourth Amendment cases. A review of these opinions demonstrates what should be clear to any observer of the Supreme Court: Justice Sotomayor consistently defends Fourth Amendment principles and values.

The Mosaic Theory Of The Fourth Amendment, Orin S. Kerr

Orin Kerr

In the Supreme Court's recent decision on GPS surveillance, United States v. Jones, five justices authored or joined concurring opinions that applied a new approach to interpreting Fourth Amendment protection. Before Jones, Fourth Amendment decisions had always evaluated each step of an investigation individually. Jones introduced what we might call a "mosaic theory" of the Fourth Amendment, by which courts evaluate a collective sequence of government activity as an aggregated whole to consider whether the sequence amounts to a search. This Article considers the implications of a mosaic theory of the Fourth Amendment. It explores the choices and puzzles that …

An Analogue Precedent In A Digital World: Exploring The Applicability Of The Third-Party Doctrine In The Modern Technology Era, Nathaniel L. Siegler

Senior Theses and Projects

No abstract provided.

The Third Party Doctrine And Physical Location: The Privacy Implications Of Warrantless Acquisition Of Historical Cell Site Location Information, Matthew G. Baker

Catholic University Law Review

The warrantless acquisition of cell site location information (CSLI) by law enforcement implicates serious privacy concerns for all cell phone owners. Through a series of cases in the Circuit Courts of Appeals, the judiciary has declared that there is no expectation of privacy in the historical location of cell phones. The third-party doctrine controls where a cell phone user voluntarily conveys his location to a cell service provider.

This Comment discusses the history of the Fourth Amendment and the development of the expectation of privacy test, the third-party doctrine, and the tracking of vehicles with transponders. This Comment reviews a …

The Private Search Doctrine And The Evolution Of Fourth Amendment Jurisprudence In The Face Of New Technology: A Broad Or Narrow Exception?, Adam A. Bereston

Catholic University Law Review

The advent of new technology has presented courts with unique challenges when analyzing searches and seizures under the Fourth Amendment. Out of necessity, the application of the Fourth Amendment has evolved to address privacy issues stemming from modern technology that could not have been anticipated by the Amendment’s drafters. As part of this evolution, the Supreme Court devised the “private search” doctrine, which upholds the constitutionality of warrantless police searches of items that were previously searched by a private party, so long as the police search does not exceed the scope of the private-party search. However, courts have struggled to …

Digital Technology And Analog Law: Cellular Location Data, The Third-Party Doctrine, And The Law‘S Need To Evolve, Justin Hill

Law Student Publications

This comment explores how broader shifts in Fourth Amendment doctrine may affect the government's collection of Cell Site Location Information (CSLI) moving forward. It consists of three parts. Part I examines the technological underpinnings of cellular networks. The issue is frequently litigated, but few in the legal community have a real grasp on the technology. A nuanced understanding of the technology is crucial when examining the accuracy of CSLI or how the third-party doctrine ought to apply. This comment consolidates and simplifies the technical workings of cellular networks to enable better and more informed answers. Last, drawing on this understanding, …

The Fourth Amendment In A Digital World, Laura K. Donohue

Georgetown Law Faculty Publications and Other Works

Fourth Amendment doctrines created in the 1970s and 1980s no longer reflect how the world works. The formal legal distinctions on which they rely—(a) private versus public space, (b) personal information versus third party data, (c) content versus non-content, and (d) domestic versus international—are failing to protect the privacy interests at stake. Simultaneously, reduced resource constraints are accelerating the loss of rights. The doctrine has yet to catch up with the world in which we live. A necessary first step for the Court is to reconsider the theoretical underpinning of the Fourth Amendment, to allow for the evolution of a …

Trespass And Deception, Laurent Sacharoff

Laurent Sacharoff

Keeping Pace: The U.S. Supreme Court And Evolving Technology, Brian Thomas

Politics Summer Fellows

Contemporary mainstream discussions of the Supreme Court are often qualified with the warning that the nine justices are out of touch with everyday American life, especially when it comes to the newest and most popular technologies. For instance, during oral argument for City of Ontario v. Quon, a 2010 case that dealt with sexting on government-issued devices, Chief Justice John Roberts famously asked what the difference was “between email and a pager,” and Justice Antonin Scalia wondered if the “spicy little conversations” held via text message could be printed and distributed. While these comments have garnered a great deal of …

State Labs Of Federalism And Law Enforcement "Drone" Use, Chris Jenks

Washington and Lee Law Review

No abstract provided.

In The Wake Of Florida V. J.L. - When Anonymous Tips Give Police Reasonable Suspicion, Robyn Silvermintz

Touro Law Review

No abstract provided.

Spies In The Skies: Dirtboxes And Airplane Electronic Surveillance, Brian L. Owsley

Michigan Law Review First Impressions

Electronic surveillance in the digital age is essentially a cat-and-mouse game between governmental agencies that are developing new techniques and technologies for surveillance, juxtaposed against privacy rights advocates who voice concerns about such technologies. In November 2014, there was a discovery of a new twist on a relatively old theme. Recently, the Wall Street Journal reported that the U.S. Marshals Service was running a surveillance program employing devices—dirtboxes—that gather all cell phone numbers in the surrounding area. Other federal agencies, including the Drug Enforcement Agency, Immigration and Custom Enforcement, and the Department of Homeland Security, are also documented to have …

Supreme Court Jurisprudence Of The Personal In City Of Los Angeles V. Patel, Brian L. Owsley

Michigan Law Review First Impressions

Recently, the Supreme Court issued a 5-4 decision in City of Los Angeles v. Patel striking down a city ordinance that required hotel and motel owners to make their guest registries available to police officers whenever requested to do so. Although the Court’s opinion in Patel simply affirmed the Ninth Circuit’s finding that the ordinance was unconstitutional, the Court could have used Patel to readdress the third-party doctrine, which establishes that “a person has no legitimate expectation of privacy in information he voluntarily turns over to third parties.” Patel provided a vehicle for the Court to do so, particularly because …

Commercial Drones And Privacy: Can We Trust States With ‘Drone Federalism’?, Robert H. Gruber

Richmond Journal of Law & Technology

Judge Andrew Napolitano said recently of unmanned aircraft systems (“UAS”), or “drones,” that “[t]he first American patriot that shoots down one of these drones that comes too close to his children in his backyard will be an American hero.”

The Court Loses Its Way With The Global Positioning System: United States V. Jones Retreats To The “Classic Trespassory Search”, George M. Dery Iii, Ryan Evaro

Michigan Journal of Race and Law

This Article analyzes United States v. Jones, in which the Supreme Court considered whether government placement of a global positioning system (GPS) device on a vehicle to follow a person’s movements constituted a Fourth Amendment “search.” The Jones Court ruled that two distinct definitions existed for a Fourth Amendment “search.” In addition to Katz v. United States’s reasonable-expectation-of-privacy standard, which the Court had used exclusively for over four decades, the Court recognized a second kind of search that it called a “classic trespassory search.” The second kind of search occurs when officials physically trespass or intrude upon a constitutionally protected …

The Right To Quantitative Privacy, Danielle K. Citron, David Gray

Faculty Scholarship

We are at the cusp of a historic shift in our conceptions of the Fourth Amendment driven by dramatic advances in surveillance technology. Governments and their private sector agents continue to invest billions of dollars in massive data-mining projects, advanced analytics, fusion centers, and aerial drones, all without serious consideration of the constitutional issues that these technologies raise. In United States v. Jones, the Supreme Court signaled an end to its silent acquiescence in this expanding surveillance state. In that case, five justices signed concurring opinions defending a revolutionary proposition: that citizens have Fourth Amendment interests in substantial quantities of …

Fighting Cybercrime After United States V. Jones, David C. Gray, Danielle Keats Citron, Liz Clark Rinehart

David C. Gray

In a landmark non-decision last term, five Justices of the United States Supreme Court would have held that citizens possess a Fourth Amendment right to expect that certain quantities of information about them will remain private, even if they have no such expectations with respect to any of the information or data constituting that whole. This quantitative approach to evaluating and protecting Fourth Amendment rights is certainly novel and raises serious conceptual, doctrinal, and practical challenges. In other works, we have met these challenges by engaging in a careful analysis of this “mosaic theory” and by proposing that courts focus …

Fighting Cybercrime After United States V. Jones, David C. Gray, Danielle Keats Citron, Liz Clark Rinehart

Danielle Keats Citron

In a landmark non-decision last term, five Justices of the United States Supreme Court would have held that citizens possess a Fourth Amendment right to expect that certain quantities of information about them will remain private, even if they have no such expectations with respect to any of the information or data constituting that whole. This quantitative approach to evaluating and protecting Fourth Amendment rights is certainly novel and raises serious conceptual, doctrinal, and practical challenges. In other works, we have met these challenges by engaging in a careful analysis of this “mosaic theory” and by proposing that courts focus …

Fighting Cyber-Crime After United States V. Jones, Danielle K. Citron, David Gray, Liz Rinehart

Faculty Scholarship

In a landmark non-decision last term, five Justices of the United States Supreme Court would have held that citizens possess a Fourth Amendment right to expect that certain quantities of information about them will remain private, even if they have no such expectations with respect to any of the information or data constituting that whole. This quantitative approach to evaluating and protecting Fourth Amendment rights is certainly novel and raises serious conceptual, doctrinal, and practical challenges. In other works, we have met these challenges by engaging in a careful analysis of this “mosaic theory” and by proposing that courts focus …

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

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 explores …

Privacy And Technology: A 125-Year Review, Lori B. Andrews

125th Anniversary Materials

No abstract provided.

Keeping Up With The Jonses: Making Sure Your History Is Just As Wrong As Everyone Else's, Brian Sawers

Michigan Law Review First Impressions

Before Katz v. United States, a search under the Fourth Amendment required a trespass. If there was no trespass on one’s property, then there was no search. In Katz, a 1967 decision, the U.S. Supreme Court abandoned that approach, instead finding a search without a trespass based on the government’s invasion of a “reasonable expectation of privacy.” In Oliver v. United States, the Court found that trespass was not sufficient to create a search. It found no reasonable expectation of privacy in open fields, and thus no search, even though the defendant had erected “No Trespassing” signs around his property …

The Politics Of Privacy In The Criminal Justice System: Information Disclosure, The Fourth Amendment, And Statutory Law Enforcement Exemptions, Erin Murphy

Michigan Law Review

When criminal justice scholars think of privacy, they think of the Fourth Amendment. But lately its domain has become far less absolute. The United States Code currently contains over twenty separate statutes that restrict both the acquisition and release of covered information. Largely enacted in the latter part of the twentieth century, these statutes address matters vital to modern existence. They control police access to driver's licenses, educational records, health histories, telephone calls, email messages, and even video rentals. They conform to no common template, but rather enlist a variety of procedural tools to serve as safeguards - ranging from …

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 …