Fourth Amendment Commons^™

Leveraging Predictive Policing Algorithms To Restore Fourth Amendment Protections In High-Crime Areas In A Post-Wardlow World, Kelly K. Koss

Chicago-Kent Law Review

Rapid technological changes have led to an explosion in Big Data collection and analysis through complex computerized algorithms. Law enforcement has not been immune to these technological developments. Many local police departments are now using highly advanced predictive policing technologies to predict when and where crime will occur in their communities, and to allocate crime-fighting resources based on these predictions.

Although predictive policing technology has an array of the potential uses, the scope of this Note is limited to addressing how the statistical outputs from these technologies can be used to restore eroded Fourth Amendment rights in alleged high-crime areas. …

No More Shortcuts: Protect Cell Site Location Data With A Warrant Requirement, Lauren E. Babst

Michigan Telecommunications & Technology Law Review

In modern society, the cell phone has become a virtual extension of most Americans, managing all kinds of personal and business matters. Modern cell tower technology allows cell service providers to accumulate a wealth of individuals’ location information while they use their cell phones, and such data is available for law enforcement to obtain without a warrant. This is problematic under the Fourth Amendment, which protects reasonable expectations of privacy. Under the Katz two-prong test, (1) individuals have an actual, subjective expectation of privacy in their cell site location data, and (2) society is prepared to acknowledge that expectation as …

Regulating Drones Under The First And Fourth Amendments, Marc Blitz, James Grimsley, Stephen E. Henderson, Joseph Thai

Faculty Articles

The FAA Modernization and Reform Act of 2012 requires the Federal Aviation Administration to integrate unmanned aerial vehicles (UAVs), or drones, into the national airspace system by September of this year. Yet perhaps because of their chilling accuracy in targeted killings abroad, perhaps because of an increasing consciousness of diminishing privacy more generally, and perhaps simply because of a fear of the unknown, divergent UAV-restrictive legislation has been proposed in Congress and enacted in a number of states. Ultimately, given UAV utility and cost effectiveness over a vast range of tasks, widespread commercial use seems certain. So it is imperative …

The Dawn Of Social Intelligence (Socint), Laura K. Donohue

Georgetown Law Faculty Publications and Other Works

More information about citizens’ lives is recorded than ever before. Because the data is digitized, it can be accessed, analyzed, shared, and combined with other information to generate new knowledge. In a post-9/‌11 environment, the legal standards impeding access to such data have fallen. Simultaneously, the advent of global communications and cloud computing, along with network convergence, have expanded the scope of information available. The U.S. government has begun to collect and to analyze the associated data.

The result is the emergence of what can be termed “social intelligence” (SOCINT), which this Article defines as the collection of digital data …

Big Data And Predictive Reasonable Suspicion, Andrew Ferguson

Scholarly Articles in Law Reviews & Journals

The Fourth Amendment requires “reasonable suspicion” to seize a suspect. As a general matter, the suspicion derives from information a police officer observes or knows. It is individualized to a particular person at a particular place. Most reasonable suspicion cases involve police confronting unknown suspects engaged in observable suspicious activities. Essentially, the reasonable suspicion doctrine is based on “small data” – discrete facts involving limited information and little knowledge about the suspect.But what if this small data is replaced by “big data”? What if police can “know” about the suspect through new networked information sources? Or, what if predictive analytics …

Robots In The Home: What Will We Have Agreed To?, Margot E. Kaminski

Publications

A new technology can expose the cracks in legal doctrine. Sometimes a technology resists analogy. Sometimes, through analogies, it reveals inconsistencies in the law, or basic flaws in framing, or in the fit between different parts of the legal system. This Essay addresses robots in the home, and what they reveal about U.S. privacy law. Household robots might not themselves uproot U.S. privacy law, but they will reveal its inconsistencies, and show where it is most likely to fracture. Just as drones are serving as a legislative “privacy catalyst” — encouraging the enactment of new privacy laws as people realize …

Swearing By New Technology: Strengthening The Fourth Amendment By Utilizing Modern Warrant Technology While Satisfying The Oath Or Affirmation Clause, Andrew H. Bean

BYU Law Review

No abstract provided.

Binary Searches And The Central Meaning Of The Fourth Amendment, Lawrence Rosenthal

William & Mary Bill of Rights Journal

No abstract provided.

When Enough Is Enough: Location Tracking, Mosaic Theory, And Machine Learning, Steven M. Bellovin, Renée M. Hutchins, Tony Jebara, Sebastian Zimmeck

Faculty Scholarship

Since 1967, when it decided Katz v. United States, the Supreme Court has tied the right to be free of unwanted government scrutiny to the concept of reasonable xpectations of privacy.^[1] An evaluation of reasonable expectations depends, among other factors, upon an assessment of the intrusiveness of government action. When making such assessment historically the Court has considered police conduct with clear temporal, geographic, or substantive limits. However, in an era where new technologies permit the storage and compilation of vast amounts of personal data, things are becoming more complicated. A school of thought known as “mosaic theory” …

Bulk Telephony Metadata Collection And The Fourth Amendment: The Case For Revisiting The Third-Party Disclosure Doctrine In The Digital Age, 31 J. Marshall J. Info. Tech. & Privacy L. 191 (2014), Timothy Geverd

UIC John Marshall Journal of Information Technology & Privacy Law

This Article argues that federal courts should seize the opportunity presented by the Snowden leaks to reexamine the continued vitality of the current third-party disclosure doctrine in Fourth Amendment jurisprudence. Specifically, this Article argues that Smith v. Maryland simply cannot continue to act as the “North Star” for judges navigating the “Fourth Amendment waters” of the digital age, and that instead, Smith should apply more narrowly in the digital age. In so arguing, this Article advocates that courts apply a modified, twostep test to evaluating third-party disclosures rather than applying the traditional binary rubric that courts have drawn from Smith …

Maryland's Social Networking Law: No "Friend" To Employers And Employees, Alexander Borman

Journal of Business & Technology Law

No abstract provided.

Failing Expectations: Fourth Amendment Doctrine In The Era Of Total Surveillance, Olivier Sylvain

Faculty Scholarship

Today’s reasonable expectation test and the third-party doctrine have little to nothing to offer by way of privacy protection if users today are at least conflicted about whether transactional noncontent data should be shared with third parties, including law enforcement officials. This uncertainty about how to define public expectation as a descriptive matter has compelled courts to defer to legislatures to find out what public expectation ought to be more as a matter of prudence than doctrine. Courts and others presume that legislatures are far better than courts at defining public expectations about emergent technologies.This Essay argues that the reasonable …

Our Records Panopticon And The American Bar Association Standards For Criminal Justice, Stephen E. Henderson

Faculty Articles

"Secrets are lies. Sharing is caring. Privacy is theft." So concludes the main character in Dave Egger’s novel The Circle, in which a single company that unites Google, Facebook, and Twitter – and on steroids – has the ambition not only to know, but also to share, all of the world's information. It is telling that a current dystopian novel features not the government in the first instance, but instead a private third party that, through no act of overt coercion, knows so much about us. This is indeed the greatest risk to privacy in our day, both the unprecedented …

Big Data Distortions: Exploring The Limits Of The Aba Leatpr Standards, Andrew Ferguson

Scholarly Articles in Law Reviews & Journals

This article examines the American Bar Associations’ Standards for Criminal Justice proposed Law Enforcement Access to Third Party Records (LEATPR). The article was written to be part of an Oklahoma Law Review Symposium on the subject of the LEATPR Standards. The article explores how the ABA LEATPR Standards can survive the impact of big data policing. Big data policing, as described here, involves utilizing vast, networked databases to investigate and also predict criminal activity. Big data policing involves the use of not just third party, but "fourth party" commercial aggregators as well as de-identified data sets, that eventually can be …

Personal Curtilage: Fourth Amendment Security In Public, Andrew Ferguson

Scholarly Articles in Law Reviews & Journals

Do citizens have any Fourth Amendment protection from sense-enhancing surveillance technologies in public? This article engages a timely question as new surveillance technologies have redefined expectations of privacy in public spaces.This article proposes a new theory of Fourth Amendment security based on the ancient theory of curtilage protection for private property. Curtilage has long been understood as a legal fiction that expands the protection of the home beyond the formal structures of the house. Curtilage recognizes a buffer zone beyond the four corners of the home that deserves protection, even in public, even if accessible to public view. Based on …

It’S Raining Katz And Jones: The Implications Of United States V. Jones–A Case Of Sound And Fury, Jace C. Gatewood

Pace Law Review

This Article discusses the implications of Jones in light of emerging technology capable of duplicating the monitoring undertaken in Jones with the same degree of intrusiveness attributable to GPS tracking devices, but without depending on any physical invasion of property. This Article also discusses how the pervasive use of this emerging technology may reshape reasonable expectations of privacy concerning an individual’s public movements, making it all the more difficult to apply the Fourth Amendment constitutional tests outlined in Jones. In this regard, this Article explores recent trends in electronic tracking, surveillance, and other investigative methods that have raised privacy concerns, …

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 …

Warrantless Government Drone Surveillance: A Challenge To The Fourth Amendment, 30 J. Marshall J. Info. Tech. & Privacy L. 155 (2013), Jennifer O'Brien

UIC John Marshall Journal of Information Technology & Privacy Law

The Federal Aviation Administration Modernization and Reform Act of 2012 aims to integrate drones into the United States national airspace by 2015. While the thought of prevalent private and public daily drone use might seem implausible now, the combination of this new legislation and the increasing availability of inexpensive, technologically advanced small drones will make it a reality. From detectaphones to pen registers and most recently, the GPS, the Supreme Court has faced a plethora of unreasonable search challenges to the warrantless use of such sense augmentation devices by law enforcement to collect information. Acting as the privacy safeguard of …

American Bar Association Criminal Justice Standards On Law Enforcement Access To Third Party Records, Stephen E. Henderson

Faculty Books and Book Chapters

Drafted over the past six years and adopted by the American Bar Association (ABA) House of Delegates in February, 2012, these Criminal Justice Standards on Law Enforcement Access to Third Party Records provide much needed guidance to legislatures, courts, and administrative agencies having to decide how to regulate law enforcement access to existing records in the hands of third parties. It is the first framework of its kind, and it can do much to improve the current system of ad hoc protections in both state and federal systems. Decision makers are struggling to determine when to permit law enforcement access …

What Alex Kozinski And The Investigation Of Earl Bradley Teach About Searching And Seizing Computers And The Dangers Of Inevitable Discovery, Stephen E. Henderson

Faculty Articles

This paper tells two stories. One concerns the investigation of a Delaware physician named Earl B. Bradley that resulted in a conviction and sentence of fourteen consecutive life terms for the sexual abuse of children. The other concerns the computer problems, both judicial and extra-judicial, of Chief Judge Alex Kozinski of the United States Court of Appeals for the Ninth Circuit. Though in a sense unrelated, they share lessons about the practicalities of computers and their search that are worth telling. As courts continue to struggle with how to cabin the searches of computers in order to minimize privacy intrusion …

After United States V. Jones, After The Fourth Amendment Third Party Doctrine, Stephen E. Henderson

Faculty Articles

In United States v. Jones, the Supreme Court unanimously rejected the proposition that the Government can surreptitiously electronically track vehicle location for an entire month without Fourth Amendment restraint. While the Court's three opinions leave much uncertain, in one perspective they fit nicely within a long string of cases in which the Court is cautiously developing new standards of Fourth Amendment protection, including a rejection of a strong third party doctrine. This Article develops that perspective and provides a cautiously optimistic view of where search and seizure protections may be headed.

More detail:

United States v. Jones, in which the …

Real-Time And Historic Location Surveillance After United States V. Jones: An Administrable, Mildly Mosaic Approach, Stephen E. Henderson

Faculty Articles

In United States v. Jones, the government took an extreme position: so far as the federal Constitution is concerned, law enforcement can surreptitiously electronically track the movements of any American over the course of an entire month without cause or restraint. According to the government, whether the surveillance be for good reason, invidious reason, or no reason, the Fourth Amendment is not implicated. Fortunately, that position was unanimously rejected by the High Court. The Court did not, however, resolve what restriction or restraint the Fourth Amendment places upon location surveillance, reflecting a proper judicial restraint in this nuanced and difficult …

Maryland V. King: Per Se Unreasonableness, The Golden Rule, And The Future Of Dna Databases, David H. Kaye

Faculty Scholarship

In Maryland v. King, the Supreme Court applied a balancing test to uphold a Maryland statute mandating preconviction collection and analysis of DNA from individuals charged with certain crimes. The DNA profiles are limited to an inherited set of DNA sequences that are not known to be functional and that are tokens of individual identity. This invited online essay examines two aspects of an article on the case by Professor Erin Murphy. I question the claim that the case is pivotal in a conceivable abandonment of the per se rule that warrantless, suspicionless searches are unconstitutional unless they fall …

On The 'Considered Analysis' Of Collecting Dna Before Conviction, David H. Kaye

Faculty Scholarship

For nearly a decade, DNA-on-arrest laws eluded scrutiny in the courts. For another five years, they withstood a gathering storm of constitutional challenges. In Maryland v. King, however, Maryland's highest court reasoned that usually fingerprints provide everything police need to establish the true identity of an individual before trial and that the state's interest in finding the perpetrators of crimes by trawling databases of DNA profiles is too "generalized" to support "a warrantless, suspicionless search." The U.S. Supreme Court reacted forcefully. Chief Justice Roberts stayed the Maryland judgment, writing that "given the considered analysis of courts on the other side …

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

Michigan Law Review

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 …

One More Good Reason For In-Car Videotaping Of Traffic Stops: An Accurate Assessment Of "Consent", Robert L. White

University of Michigan Journal of Law Reform Caveat

There are a number of reasons why legislative reform mandating the use of in-car cameras in police cruisers would benefit the criminal justice system in Illinois. In-car cameras provide evidence for cases involving traffic violations or intoxicated motorists. They produce instantly available training materials. They also assist victims of police misconduct, as well as officers defending themselves against misconduct claims. This Comment looks to add to this list of benefits the role in-car cameras can play in assessing the validity of consents to search that officers obtain during traffic stops.

The Latest 4th Amendment Privacy Conundrum: "Stingrays", Max Bulinksi

University of Michigan Journal of Law Reform Caveat

Wired is reporting renewed hubbub regarding statutory and Fourth Amendment protections of individuals’ privacy in the digital age. This time, it comes in the form of federal officers using a fake cellphone tower (called a “stingray”) to locate their suspect, Mr. Rigmaiden, by tracking the location of his cellphone. According to an affidavit submitted to the court, the stingray only captures the equivalent of header information – such as the phone or account number assigned to the aircard as well as dialing, routing and address information involved in the communication.

Technological Leap, Statutory Gap, And Constitutional Abyss: Remote Biometric Identification Comes Of Age, Laura K. Donohue

Georgetown Law Faculty Publications and Other Works

Federal interest in using facial recognition technology (“FRT”) to collect, analyze, and use biometric information is rapidly growing. Despite the swift movement of agencies and contractors into this realm, however, Congress has been virtually silent on the current and potential uses of FRT. No laws directly address facial recognition—much less the pairing of facial recognition with video surveillance—in criminal law. Limits placed on the collection of personally identifiable information, moreover, do not apply. The absence of a statutory framework is a cause for concern. FRT represents the first of a series of next generation biometrics, such as hand geometry, iris, …

Signal Lost: Is A Gps Tracking System The Same As An Eyeball?, Eric Andrew Felleman

University of Michigan Journal of Law Reform Caveat

On November 8th, the Supreme Court will hear arguments in United States v. Jones. One of the primary issues in the case is whether law enforcement personnel violated Mr. Jones' Fourth Amendment right to freedom from unreasonable searches and seizures by using a GPS tracking device to monitor the location of his car without a warrant. The 7th Circuit and the 9th Circuit have both recently held that use of GPS tracking is not a search under the Fourth Amendment.

Expectations Of Privacy In Social Media, Stephen E. Henderson

Faculty Articles

This article, which largely tracks my remarks at Mississippi College’s Social Media Symposium, examines expectations of privacy in social media such as weblogs (blogs), Facebook pages, and Twitter tweets. Social media is diverse and ever-diversifying, and while I address some of that complexity, I focus on the core functionality, which provides the groundwork for further conversation as the technology and related social norms develop. As one would expect, just as with our offline communications and other online communications, in some we have an expectation of privacy that is recognized by current law, in some we have an expectation of privacy …