Fourth Amendment Commons^™

The Warrant Exception That Isn't: Fisa Section 702, "Defensive" Searches, And The Fourth Amendment, Noah C. Chauvin

Faculty Articles

Section 702 of the Foreign Intelligence Surveillance Act allows the government to conduct warrantless electronic surveillance of non-Americans who are located overseas. Although the surveillance targets foreigners, Americans' communications are "incidentally" collected, too. Once the government has acquired Americans' communications, court-approved rules allow it to conduct warrantless searches for and through them in its Section 702 databases. Intelligence agencies have used these rules to turn this foreign intelligence program into a domestic spying tool, conducting tens of thousands of warrantless "backdoor" searches for Americans' private communications obtained under Section 702 every year.

Section 702 periodically sunsets; Congress most recently reauthorized …

Katz'S Imperfect Circle: An Empirical Study Of Reasonable Expectations Of Privacy, Tonja Jacobi, Christopher Brett Jaeger

Faculty Articles

Under Katz v. United States, the Fourth Amendment restricts government actions that infringe upon expectations of privacy that society recognizes as reasonable. This foundational test has long been criticized as circular, both because courts can shape the very expectations they seek to identify through their decisions and because governments can manipulate those expectations to expand the reach of their own power. But how do members of society decide what expectations are reasonable, and how do judges ascertain those expectations? And are expectations of privacy malleable even without deliberate manipulation?

This Article shows that the circularity critique is both understated …

The Unconstitutional Conditions Vacuum In Criminal Procedure, Kay L. Levine, Jonathan R. Nash, Robert A. Schapiro

Faculty Articles

For more than a century, the Supreme Court has applied the unconstitutional conditions doctrine in many contexts, scrutinizing government efforts to condition the tradeoff of rights for benefits with regard to speech, funding, and takings, among others. The Court has declined, however, to invoke the doctrine in the area of criminal procedure, where people accused of crime are often asked to—and often do—surrender their constitutional rights under the Fourth, Fifth, and Sixth Amendments in return for some benefit. Despite its insistence that the unconstitutional conditions doctrine applies broadly across the Bill of Rights, the Court’s jurisprudence demonstrates that the doctrine …

Pyrrhic Victories: The Mirage Of Winning At The Supreme Court, Tonja Jacobi, Clare G. Willis

Faculty Articles

We conduct in-depth archival research of landmark constitutional criminal procedure cases and find two ways in which the declarations of the vindication of rights they contain are misleading. First, most defendants who successfully establish police violations of their constitutional rights before the highest court in the land nonetheless remain in prison for years or decades subsequently. The multitude of ways in which the state can convict the individual defendant even in the face of one or more constitutional violations means that the Supreme Court precedents that bear their names seldom translate to genuine wins for the defendants. Second, there are …

More Than Friends: A New Theory For The Third-Party Doctrine, Eang Ngov

Faculty Articles

When a person gives information or something tangible to someone or a business, the Fourth Amendment’s third-party doctrine allows the government to obtain that evidence without a warrant or probable cause. The third-party doctrine is premised on the rationale that we hold no reasonable expectation of privacy when we voluntarily expose information to others, that we assume the risk that the third party would share the information, and that we must deal with the consequences of that misplaced trust. The doctrine originated from a series of cases where law enforcement obtained information revealed by criminals through their mistaken trust of …

A Wolf In Sheep’S Attire: How Consent Enfeebles Our Fourth Amendment, Stephen E. Henderson, Guha Krishnamurthi

Faculty Articles

The Fourth Amendment is a mirage. On paper—in the rules studied by law students, analyzed by scholars, and proclaimed by jurists—its limitations are many and, oftentimes, significant. Yet the experience of large numbers of Americans is entirely to the contrary, thanks to the rights-annihilating, under-theorized exception of “consent.” Under its guise, law enforcement officers routinely conduct what would otherwise be constitutionally-restrained searches and seizures, and they do so without meaningful explanation or assent. Fortunately, change—whether legislative or (ideally) constitutional—could be straightforward. Thanks to other sufficient triggers, consent could be replaced by a narrow, rights-protective doctrine under which law enforcement could …

Asymmetries, Norm Matching, And The Pursuit Of Equity Between The Police And The Public, Eang Ngov

Faculty Articles

Concerns about police abuse and overcriminalization are on the forefront of public conscientiousness. In spite of the Black Lives Matter movement and calls for police reform, law enforcement officials enjoy a variety of criminal procedure loopholes and double standards, which the United States Supreme Court has ratified through its creation of the open fields, mistake of law, and third party doctrines, as well as its acceptance of deceptive police practices. This Article analyzes the asymmetries between permissible civilian conduct and permissible police conduct to make a broader, systemic critique of the double standards and loopholes that pervade constitutional criminal procedure. …

Searches Without Suspicion: Avoiding A Four Million Person Underclass, Tonja Jacobi, Addie Maguire

Faculty Articles

In Samson v. California, the Supreme Court upheld warrantless, suspicionless searches for parolees. That determination was controversial both because suspicionless searches are, by definition, anathema to the Fourth Amendment, and because they arguably undermine parolees’ rehabilitation. Less attention has been given to the fact that the implications of the case were not limited to parolees. The opinion in Samson included half a sentence of dicta that seemingly swept probationers into its analysis, implicating the rights of millions of additional people in the United States. Not only is analogizing parolees and probationers not logically sound because the two groups differ …

On Warrants & Waiting: Electronic Warrants & The Fourth Amendment, Tracy Hresko Pearl

Faculty Articles

Police use of electronic warrant (“e-warrant”) technology has increased significantly in recent years. E-warrant technology allows law enforcement to submit, and magistrate judges to review and approve, warrant applications on computers, smartphones, and tablets, often without any direct communication. Police officers report that they favor e-warrants over their traditional counterparts because they save officers a significant amount of time in applying for warrants by eliminating the need to appear in-person before a magistrate. Legal scholars have almost uniformly praised e-warrant technology, as well, arguing that use of these systems will increase the number of warrants issued throughout the United States …

Search And Seizure Budgets, Kiel Brennan-Marquez, Stephen E. Henderson

Faculty Articles

This article proposes a new means of restraining police power: quantitative limits on the number of law enforcement intrusions—searches and seizures—that may occur over a given period of time. Like monetary constraints, search and seizure budgets would aim to curb abusive policing and improve democratic oversight. But unlike their monetary counterparts, budgets would be indexed directly to the specific police activities that most enable escalation and abuse. What is more, budgets are a tool that finds support, conceptually, in the American framing experience. The Fourth Amendment has long been understood to require procedural limits, such as probable cause, on specific …

In Celebration Of Dissents (And Lengthy Textbooks): How Digital Became Different For The Fourth Amendment And Why It Is Time For A Real Warrant Default, Stephen E. Henderson

Faculty Articles

The last decade has brought tremendous change to the Fourth Amendment, finally resulting in a ‘digital is different’ norm. We stand at an inflection point between a monolithic, analog past and a murky future of yet-unarticulated constitutional digital policing rules. It is a good time, then, to reflect upon how we came to be here and where we ought to go. This Essay first looks back to a monumental, majestic dissent: that of Justice Louis Brandeis in the 1928 decision of Olmstead v. United States. Every American, and especially every law student, ought to know that opinion, and judges …

A Solution For The Third-Party Doctrine In A Time Of Data Sharing, Contact Tracing, And Mass Surveillance, Tonja Jacobi, Dustin Stonecipher

Faculty Articles

Today, information is shared almost constantly. People share their DNA to track their ancestry or for individualized health information; they instruct Alexa to purchase products or provide directions; and, now more than ever, they use videoconferencing technology in their homes. According to the third-party doctrine, the government can access all such information without a warrant or without infringing on Fourth Amendment privacy protections. This exposure of vast amounts of highly personal data to government intrusion is permissible because the Supreme Court has interpreted the third-party doctrine as a per se rule. However, that interpretation rests on an improper understanding of …

The Corrosive Effect Of Inevitable Discovery On The Fourth Amendment, Tonja Jacobi, Elliot Louthen

Faculty Articles

The Supreme Court has only once, almost four decades ago, addressed the doctrine of inevitable discovery, when it established the exception in Nix v. Williams. Inevitable discovery encapsulates the notion of no harm, no foul—if law enforcement would have discovered unlawfully obtained evidence regardless of a constitutional violation, then the resulting evidence need not be excluded. Nix laid out two simple dictates: the eponymous requirement of inevitability and a corresponding evidentiary burden requiring the prosecution to prove by a preponderance of the evidence that law enforcement inevitably would have discovered the evidence without the violation. Such analysis requires counterfactual …

The Fourth Amendment In The Age Of Autonomous Vehicles, Tracy Hresko Pearl

Faculty Articles

Autonomous vehicles exist at the intersection of two extremely turbulent areas of Fourth Amendment jurisprudence—traffic stops and emerging technologies—and have implications for virtually every major search and seizure doctrine developed over the last century. Complicating matters even further is the fact that car manufacturers are developing these vehicles at varying rates, meaning that vehicles with differing levels of automation are being introduced onto the consumer market at different (and often unpredictable) times. Each level of vehicle automation, in turn, poses unique issues for law enforcement. Semi-autonomous (Levels 2 and 3) vehicles make it extremely difficult for police to distinguish between …

Carpenter V. United States And The Fourth Amendment: The Best Way Forward, Stephen E. Henderson

Faculty Articles

We finally have a federal ‘test case.’ In Carpenter v. United States, the Supreme Court is poised to set the direction of the Fourth Amendment in the digital age. The case squarely presents how the twentieth-century third party doctrine will fare in contemporary times, and the stakes could not be higher. This Article reviews the Carpenter case and how it fits within the greater discussion of the Fourth Amendment third party doctrine and location surveillance, and I express a hope that the Court will be both a bit ambitious and a good measure cautious. As for ambition, the Court …

Supreme Irrelevance: The Court’S Abdication In Criminal Procedure Jurisprudence, Tonja Jacobi, Ross Berlin

Faculty Articles

Criminal procedure is one of the Supreme Court’s most active areas of jurisprudence, but the Court’s rulings are largely irrelevant to the actual workings of the criminal justice system. The Court’s irrelevance takes two forms: objectively, on the numbers, its jurisprudence fails to protect the vast majority of people affected by the criminal justice system; and in terms of salience, the Court has sidestepped the major challenges in the United States today relating to the criminal justice system. These challenges include discrimination in stops and frisks, fatal police shootings, unconscionable plea deals, mass incarceration, and disproportionate execution of racial minorities. …

Police Ignorance And Mistake Of Law Under The Fourth Amendment, Eang Ngov

Faculty Articles

No abstract provided.

Fourth Amendment Anxiety, Kiel Brennan-Marquez, Stephen E. Henderson

Faculty Articles

In Birchfield v. North Dakota (2016), the Supreme Court broke new Fourth Amendment ground by establishing that law enforcement’s collection of information can be cause for “anxiety,” meriting constitutional protection, even if subsequent uses of the information are tightly restricted. This change is significant. While the Court has long recognized the reality that police cannot always be trusted to follow constitutional rules, Birchfield changes how that concern is implemented in Fourth Amendment law, and importantly, in a manner that acknowledges the new realities of data-driven policing. Beyond offering a careful reading of Birchfield, this Article has two goals. First, …

Evidence Laundering In A Post-Herring World, Kay L. Levine, Jenia I. Turner, Ronald F. Wright

Faculty Articles

The Supreme Court’s decision in Herring v. United States authorizes police to defeat the Fourth Amendment’s protections through a process we call evidence laundering. Evidence laundering occurs when one police officer makes a constitutional mistake when gathering evidence and then passes that evidence along to a second officer, who develops it further and then delivers it to prosecutors for use in a criminal case. The original constitutional taint disappears in the wash.

Courts have allowed evidence laundering in a variety of contexts, from cases involving flawed databases to cases stemming from faulty judgments and communication lapses in law enforcement teams. …

Lawn Signs: A Fourth Amendment For Constitutional Curmudgeons, Andrew Ferguson, Stephen E. Henderson

Faculty Articles

What is the constitutional significance of the proverbial “keep off the grass” sign? This question—asked by curmudgeonly neighbors everywhere—has been given new currency in a recent decision by the United States Supreme Court. Indeed, Florida v. Jardines might have bestowed constitutional curmudgeons with significant new Fourth Amendment protections. By expressing expectations regarding—and control over—access to property, “the people” may be able to claim greater Fourth Amendment protections not only for their homes, but also for their persons, papers, and effects. This article launches a constitutionally grounded, but lighthearted campaign of citizen education and empowerment: Fourth Amendment LAWn signs. With every …

A Rose By Any Other Name: Regulating Law Enforcement Bulk Metadata Collection, Stephen E. Henderson

Faculty Articles

In Other People’s Papers, Jane Bambauer argues for careful reform of the Fourth Amendment’s third party doctrine, providing an important contribution to an increasingly rich field of scholarship, judicial opinion, statute, and law reform. Bambauer is especially concerned with access to bodies of third-party data that can be filtered and mined, as they can be privacy invasive but also effective and less subject to traditional investigative prejudices and limitations. Although her article provocatively overclaims in trying to set itself apart from existing proposals, by analyzing existing constitutional and statutory law—including what I have termed a “limited” third party doctrine—and comparing …

Teaching Criminal Procedure: Why Socrates Would Use Youtube, Stephen E. Henderson, Joseph Thai

Faculty Articles

In this invited contribution to the Law Journal's annual Teaching Issue, we pay some homage to the great philosopher whose spirit allegedly guides our classrooms, in service of two concrete goals. One, we employ dialogue to describe the “nuts and bolts” of teaching Criminal Procedure, most of which are equally relevant to any doctrinal law school course (including course description, office hours, seating charts and attendance, class decorum and recording, student participation, laptops, textbooks, class preparation and presentation, and exams). Two, we explain the benefits of using multimedia in the classroom, including a few of the many modules found on …

Fourth Amendment Time Machines (And What They Might Say About Police Body Cameras), Stephen E. Henderson

Faculty Articles

When it comes to criminal investigation, time travel is increasingly possible. Despite longstanding roots in traditional investigation, science is today providing something fundamentally different in the form of remarkably complete digital records. And those big data records not only store our past, but thanks to data mining they are in many circumstances eerily good at predicting our future. So, now that we stand on the threshold of investigatory time travel, how should the Fourth Amendment and legislation respond? How should we approach bulk government capture, such as by a solar-powered drone employing wide-area persistent stare technology? Is it meaningfully different …

Criminal Innovation And The Warrant Requirement: Reconsidering The Rights-Police Efficiency Trade-Off, Tonja Jacobi, Jonah Kind

Faculty Articles

It is routinely assumed that there is a trade-off between police efficiency and the warrant requirement. But existing analysis ignores the interaction between law-enforcement investigative practices and criminal innovation. Narrowing the definition of a search or otherwise limiting the requirement for a warrant gives criminals greater incentive to innovate to avoid detection. With limited resources to develop countermeasures, law enforcement officers will often be just as effective at capturing criminals when facing higher Fourth Amendment hurdles. We provide a game-theoretic model that shows that when law-enforcement investigation and criminal innovation are considered in a dynamic context, the police efficiency rationale …

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 Attrition Of Rights Under Parole, Tonja Jacobi, Song Richardson, Gregory Barr

Faculty Articles

We conduct a detailed doctrinal and empirical study of the adverse effects of parole on the constitutional rights of both individual parolees and the communities in which they live. We show that parolees' Fourth, Fifth and Sixth Amendment rights have been eroded by a multitude of punitive conditions endorsed by the courts. Punitive parole conditions actually increase parolees' vulnerability to criminal elements, and thus likely worsen recidivism. Simultaneously, the parole system broadly undermines the rights of nonparolees, including family members, cotenants, and communities. We show that police target parolee-dense neighborhoods for additional Terry stops, even when income, race, population, and …

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 …

Reforming The Grand Jury To Protect Privacy In Third Party Records, Andrew Taslitz, Stephen E. Henderson

Faculty Articles

In late 2014, two grand juries returned controversial no bill decisions in police killings, one in Ferguson, Missouri, and one in New York City. These outcomes have renewed calls for grand jury reform, and whatever one thinks of these particular processes and outcomes, such reform is long overdue. One logical source of reform to better respect privacy in records, which would have incidental benefits beyond this privacy focus, would be the newly enacted American Bar Association Standards for Criminal Justice on Law Enforcement Access to Third Party Records (LEATPR).

But LEATPR exempts from its requirements access to records via a …

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 …

Search, Seizure, And Immunity: Second-Order Normative Authority And Rights, Stephen E. Henderson, Kelly Sorensen

Faculty Articles

A paradigmatic aspect of a paradigmatic kind of right is that the rights holder is the only one who can alienate it. When individuals waive rights, the normative source of that waiving is normally taken to be the individual herself. This moral feature—immunity—is usually in the background of discussions about rights. We bring it into the foreground here, with specific attention to a recent U.S. Supreme Court decision, Kentucky v. King (2011), concerning search and seizure rights. An entailment of the Court’s decision is that, at least in some cases, a right can be removed by the intentional actions of …