Fourth Amendment Commons^™

Textual (In)Difference In State Search-And-Seizure Provisions, Quinn Yeargain

Northwestern University Law Review

Over the past 250 years, state constitutional drafters have refined the scope of rights and liberties protected by their constitutions’ texts. Today, all state constitutions include a search-and-seizure provision—and though only a minority follow the layout, text, and context of the Fourth Amendment to the U.S. Constitution, most of them bear a striking resemblance to it. However, textual variations abound. Some of them may seem minor, like using the word “possessions” instead of “effects,” or mandating that warrants describe their intended targets “as nearly as may be” instead of requiring that they “particularly describ[e]” them. But others, like the addition …

Washington Search And Seizure Law: 2026 Update, Justice Charles W. Johnson, Justice Debra L. Stephens, Justice Steven González

Seattle University Law Review

This Survey is intended to serve as a resource which Washington lawyers, judges, law enforcement officers, and others can turn to as an authoritative starting point for researching Washington search and seizure law. In order to be useful as a research tool, this Survey requires periodic updates to address new cases interpreting the Washington constitution and the U.S. Constitution and to reflect the current state of the law. As the U.S. Supreme Court has continued to examine Fourth Amendment search and seizure jurisprudence, its decisions and reflections on Washington law are discussed.

Most of the Survey cases involve the Washington …

Cross-Enforcing The Plain Smell Doctrine, Alexa Perez

Washington Law Review

In a state that has legalized marijuana, does a state officer have probable cause to conduct a warrantless search of a vehicle based on the smell of marijuana alone, because marijuana is still prohibited under federal law? This Article is the first to consider that unsettled question. Over the last ten years, almost every state has altered the legality of marijuana in some way, either through decriminalization or legalization. Yet the possession, use, and cultivation of marijuana continue to be illegal at the federal level. Prior to these reforms, state courts generally upheld warrantless searches of vehicles based on nothing …

Reasonable, Legal, Voluntary? Grants Pass Decision Sparks Need For A Revised Fourth Amendment Search Analysis In The Context Of Homelessness, Hali R. Woods

Catholic University Law Review

On June 28, 2024 the Supreme Court decided City of Grants Pass, Oregon v. Johnson.  The case addressed whether the enforcement of city ordinances regulating camping on public property against individuals including respondents, unhoused individuals residing in the city of Grants Pass, constituted cruel and unusual punishment under the Eighth Amendment.  The Court upheld enforcement of the ordinances and since then approximately 150 cities across the United States have passed similar ordinances or strengthened existing similar laws.  This comment evaluates how Grants Pass is an Eighth Amendment case with Fourth Amendment consequences which sparks a need for a revised …

Rethinking Objectivity: The Problem Of Pretext In The Fourth Amendment, Monu S. Bedi

Indiana Law Journal

Pretextual encounters continue to erode the legitimacy of the Supreme Court’s Fourth Amendment jurisprudence. Simply put, a police officer can act on personal bias or animus as long as the search or seizure is deemed “objectively reasonable.” Numerous scholars (e.g., Bennett Capers, Gabriel Chin, and David Harris) have critiqued this objective standard, contending it perpetuates discriminatory practices, particularly against communities of color. The late Justice Ruth Bader Ginsburg herself suggested that the Court might need to reconsider the legal precedent she helped establish. More recently, Orin Kerr has also argued that the Court’s reliance on objective determinations is inconsistent with …

Time As A Constitutional Constraint: Resolving The Circuit Split On Prolonged Fourth Amendment, Ian Seabrooks

Washington Law Review Online

The Fourth Amendment of the U.S. Constitution states, “[t]he right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated. . . .” Some circuits, like the Ninth and D.C. Circuits, have interpreted the Fourth Amendment’s reasonableness standard to apply beyond just the initial seizure of property but also to include the continued retention of the seized property. Other circuits, such as the First, Second, Sixth, Seventh, and Eleventh Circuits, have read the reasonableness standard more narrowly and interpreted this requirement to pertain only to the original seizure. …

Police Use Of Force: Barnes V. Felix And Moving Beyond The Moment Of Threat, Rebecca Aitchison

Roger Williams University Law Review

No abstract provided.

Justifying The Fourth Amendment, Daniel Epps

Scholarship@WashULaw

Why does the Fourth Amendment belong in the Constitution? This question is not whether society should impose some legal restraints on government searches and seizures. Rather, why should such protections reside in our national charter, superior to other forms of law and insulated from change via ordinary majoritarian political processes? Despite major disputes about the Fourth Amendment’s content, Fourth Amendment theorists rarely ask this question. Almost all agree that the Fourth Amendment’s constitutional protections are critically important—even if no one can agree exactly what those protections are.

This Article seeks a justification for the Fourth Amendment—the reason why search-and-seizure protections …

Justifying The Fourth Amendment, Daniel Epps

Vanderbilt Law Review

Why does the Fourth Amendment belong in the Constitution? This question is not whether society should impose some legal restraints on government searches and seizures. Rather, why should such protections reside in our national charter, superior to other forms of law and insulated from change via ordinary majoritarian political processes? Despite major disputes about the Fourth Amendment's content, Fourth Amendment theorists rarely ask this question. Almost all agree that the Fourth Amendment's constitutional protections are critically important-even if no one can agree exactly what those protections are.
This Article seeks a justification for the Fourth Amendment-the reason why search-and-seizure protections …

"Intolerable" Inquiries, Zachary R. Cormier

St. John's Law Review

(Excerpt)

A growing majority of courts have broadly accepted travel-plan questions (and their follow-up questions) as a qualifying category of traffic-mission inquiries under Rodriguez, leaving officers with a clear pathway from pretextual traffic stop—to extended discussion about vehicle occupant activities outside the traffic violation—to drug dog sniff—to vehicle search. A closer analysis of Rodriguez, however, precludes such passage through the heart of its traffic-mission rule. This Article will demonstrate that travel-plan questioning cannot qualify alongside the roadway safety checks identified by Rodriguez in its traffic-mission inquiry list because such checks provide direct information about another safety-related traffic violation …

The Equal Protection-Fourth Amendment Shell Game: An Essay On The Limited Reach Of The 2023 Affirmative Action Cases, The Fourth Amendment, And Race Beyond Skin Color, David B. Owens

Articles

In striking down race-conscious admissions at Harvard and the University of North Carolina, the Supreme Court used lofty rhetoric about the importance of ending race discrimination, even calling the command of Equal Protection “universal.” In two ways, this Essay explores the legal and practical limits of the affirmative action cases and illustrates how the Court’s claimed concern about race discrimination rings hollow. First, this Essay discusses state actors permitted to use race in their decision-making: the police. Unlike elite universities whose policies are subject to exacting scrutiny, the Supreme Court permits police to use race when deciding whom to seize …

Caution: Potholes In E-Scooter Data Collection, Dakota Rakestraw

Seattle University Law Review

Lime scooters keep ending up in major waterways in Washington state metro areas, a testament to the ubiquity of e-scooters in the metropolitan landscape. How they get there is unclear. Why they get there is even murkier. Perhaps the answer lies in the implications of modern geolocation data collection through e-scooters and gaps in current data collection regulation curbing individual liberties.

Since September 2020, electric scooters have run Seattle’s streets and have dramatically overtaken ridesharing bike trips. For example, from September 2020 to September 2021, there were about 1.4 million scooter and bike trips with September 2021 seeing 300,000 scooter …

Privacy In The Age Of Platforms: How Digital Advancements Are Outrunning Our Constitution, Haleigh Fagundes

Capstone Projects and Master's Theses

This project analyzes the procedural history of Fourth Amendment doctrine in the Supreme Court. This timeline begins with the 1928 case of Olmstead v. United States and proceeds with recent cases that resolve more modern concerns such as location tracking via cell-cite information, as seen in Carpenter v. United States (2018). Prevalent cases are analyzed through both majority and dissenting opinions to demonstrate the entire Courts’ attitude towards the interpretation. Though more recently the Court has moved towards expanding the expectation of privacy that one can assume from the Fourth Amendment, digital privacy has yet to be incorporated. The research …

Power, Responsibility, And Judicial Deference To Police Expertise In Fourth Amendment Decisionmaking, Nicholas A. Kahn-Fogel

St. John's Law Review

(Excerpt)

Courts have long deferred to police expertise in Fourth Amendment decisionmaking, most prominently in their application of the reasonable-person standard in assessments of probable cause and reasonable suspicion. Scholars have often bemoaned such deference as an abdication of the judicial obligation to make independent determinations of Fourth Amendment reasonableness. Nonetheless, the Supreme Court of the United States and lower courts are unlikely to abandon their view of police officers as possessing elevated knowledge, skill, experience, and perceptual abilities that merit judicial consideration in the evaluation of Fourth Amendment probabilities. On the other hand, the Court has tended to assume …

Race, The Academy, And The Constitution Of The War On Drugs, Jeffrey Bellin, Bennett Capers

Vanderbilt Law School Faculty Publications

The war on drugs is widely viewed as a policy failure. Despite massive government intrusions on personal liberty, drug addiction, overdoses, and drug-related violence have only in- creased since the war was declared in 1971. David Pozen's new book, The Constitution of the War on Drugs, reveals a constitutional failure as well. Pozen chronicles a host of constitutional arguments that American litigants deployed to protect a "right" to use drugs with surprising, if fleeting, suc- cess. Pozen asks what might have been, exploring why the courts backtracked and effectively re- moved the Constitution as a meaningful obstacle to drug prohibitions. …

Trespass To Chattel And The Fourth Amendment, Will Baskin

Texas A&M Journal of Property Law

Like an adolescent maturing into adulthood, Fourth Amendment search doctrine has gone through phases. Scholars may debate the underlying principles that have governed each phase, but they agree that two Supreme Court decisions dominate the doctrine as it stands today: Katz v. United States and United States v. Jones. The younger of these two rivals, Jones, has caused its share of consternation. Courts have struggled to consistently apply its trespass-based test, despite the test’s seemingly simple formulation. This Note considers the Jones test in the context of personal property, or chattel, making two arguments: first, careful adherence to common-law principles …

Peeping Town: Drone Surveillance And The Exclusionary Rule In Long Lake Township V. Maxon, Stuart Massa

Northwestern University Law Review

For years, legal commentators have pondered the effect of the Fourth Amendment on drones, but purely as an academic exercise. No court had ever considered drone surveillance under the Fourth Amendment––until now. In Long Lake Township v. Maxon, a northern Michigan township flew a drone over a local resident’s home to gather photographic evidence of an alleged zoning violation. Relying on that evidence, the township sued to enforce its zoning ordinance. The resident moved to suppress the evidence, arguing that the drone’s warrantless surveillance violated the Fourth Amendment. The case made it all the way up to the Michigan …

The Fourth Amendment's Hidden Intrusion Doctrine, Laura Ginsberg Abelson

Faculty Journal Articles and Book Chapters

The Fourth Amendment’s concept of probable cause is the linchpin of legal standards governing law enforcement actions such as arrests, searches, and seizures. This article challenges the assumption that the same quantum of evidence can meet the probable cause standard regardless of whether law enforcement seek to conduct a search, to seize evidence, or to make an arrest, and regardless of the intrusiveness of such search or seizure. This paper demonstrates that the Supreme Court implicitly considers the degree of intrusion into privacy or liberty, not just the quantum or quality of evidence, when determining whether probable cause exists. In …

Loopholes Of Liberty: The Supreme Court’S Evisceration Of The Fourth Amendment, David J. Looney

Touro Law Review

The Fourth Amendment’s protections against unwarranted government intrusion are currently undermined by the Supreme Court’s third party and open fields doctrines, which permit warrantless access to shared data and private land beyond a home’s curtilage, clashing with the Amendment’s aim to safeguard privacy and property in an era of advanced surveillance. These doctrines enable arbitrary governmental overreach, necessitating urgent review to restore constitutional protections. Rooted in Enlightenment principles, the Fourth Amendment historically protected “papers” and “effects” from physical trespass, as seen in Boyd v. United States. Katz v. United States introduced a “reasonable expectation of privacy” test, but its subjective …

The Reality Of The Good Faith Exception, Matthew Tokson, Michael Gentithes

Utah Law Faculty Scholarship

The Fourth Amendment’s primary remedy is the exclusion of unlawfully obtained evidence at trial. But not every defendant whose rights are violated gets a remedy. The most substantial obstacle for defendants is the good faith exception, which directs courts to admit unlawfully collected evidence if the police can show they relied in good faith on existing authority. If the police rely on a statute that turns out to be unconstitutional, or a warrant or precedent that turns out to be invalid, the evidence they obtain will nonetheless be admitted under the good faith exception. The Supreme Court has justified this …

Facial Recognition Technology And The First Amendment, Joseph A. Tomain

Articles by Maurer Faculty

The growing ubiquity of facial recognition technology (FRT) is a problem. While much has been written on harmful government use of FRT, little has been written regarding harmful private actor use. This Article helps fill a gap in the literature by providing a detailed analysis of the First Amendment interests at stake when private actors use FRT. Specifically, this Article analyzes whether laws that limit the use of publicly available photographs to create faceprints for inclusion in FRT databases violate the First Amendment rights of private actors.

In May 2025, a multidistrict litigation against Clearview AI, an FRT company, offered …

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 …

Office Intent And Excessive Force, John F. Preis

Law Faculty Publications

In the mayhem that often accompanies a police officer’s use of force, all manner of mistakes and miscalculations can occur. Suspects are accidentally shot, innocent bystanders are bitten by police dogs, and hostages are killed instead of their kidnappers. To what degree may persons harmed by police mistakes obtain relief through excessive force claims?

At present, the answer to this question is surprisingly uncertain. It is clear that an excessive force claim requires that an officer intend to seize the suspect, but it is far less clear whether the officer must also intend the nature and extent of force used …

The Evolution Of Surveillance And The Decline Of Privacy, Alan J. Geyer

Honors Undergraduate Theses

This study directly examines how surveillance law and technology have evolved in the United States and how privacy rights have declined correspondingly. The study specifically focuses on how advancements in surveillance technology have overstepped the boundaries of Fourth Amendment protections and analyzes whether these provisions are adequate for protecting citizens in the modern technological era. The study explores newly employed methods of technological surveillance, such as facial recognition, data collection, and automated license plate readers. It focuses on how government surveillance programs have reshaped legal and ethical understandings of privacy. The changes in surveillance and technology have been analyzed by …

Free Movement Rights And The American City, Ryan Stoa

FIU Law Review

American cities are facing an inflection point. Widespread dissatisfaction with urban planning outcomes is making land use and transportation policies (such as congestion pricing) a mainstream topic of debate. Suburban sprawl and housing shortages are moving urban populations into the periphery, commuting times (and associated mental health problems) are increasing, and pedestrian and cyclist deaths caused by vehicles are at all-time highs. American cities that were largely planned and built in the twentieth century based on assumptions that we now know are flawed are not meeting the needs of their residents, and urban planners are making changes to reshape urban …

Family Regulation's Consent Problem, Anna Arons

Faculty Publications

The home is the most protected space in constitutional law. But family regulation investigators conduct millions of home searches a year. Under pressure, parents nearly always consent to these state agents’ entry into the most private areas of their lives.

This Article identifies the coercive forces—not least the threat of family separation—that drive parents to consent to home searches. Drawing on primary sources and case law examining consent in criminal cases, it shows that common family regulation investigation tactics render consent involuntary and the ensuing searches unconstitutional. And yet, it argues, the Constitution is not enough. Though constitutional litigation could …

Utah V. Strieff And Teaching Analysis, Lisa A. Tucker

St. John's Law Review

(Excerpt)

In Utah v. Strieff, the Supreme Court considered whether the Fourth Amendment required suppression of evidence obtained in an unlawful investigatory stop when police discovered that the person stopped was subject to lawful arrest based on an unrelated outstanding warrant. The majority opinion, written by Justice Clarence Thomas, held that suppression was not required in such a case; the dissent by Justice Sotomayor argued that it should be.

These two legal opinions took jarringly different approaches to determining a question of law, one that disproportionately impacts people of color, who are statistically most likely to be unlawfully stopped …

After The Age Of Discretion: Policing And Privacy In A World Of Automated Roadway Enforcement, Trayce Hockstad, Lawrence Cappello

St. John's Law Review

(Excerpt)

Our Fourth Amendment attempts to harmonize in fifty-eight words the tenuous, antagonistic relationship between privacy and public safety. These two values appear to be deadlocked in a contentious legal orbit, leaving behind them a trail of fascinating but foreboding jurisprudence in American law. The fundamental need of individuals for spaces of seclusion from government surveillance has endured a slow siphoning of its constitutional protection by the encroaching definition of the “public” and the perceived need to police every person and place that may be considered so. Nowhere has this proven truer than our nation’s roadways. As the judicial system …

United States V. Jones: Big Brother And The "Common Good" Versus The Fourth Amendment And Your Right To Privacy, Melanie Reid

Tennessee Journal of Law and Policy

No abstract provided.

Back To The Future: Revisiting State Constitutions To Protect Against New Technological Intrusions, Matthew Radford

Washington and Lee Law Review

The Fourth Amendment is crucial for protecting Americans from government intrusion. However, new technologies such as pole cameras, reverse keyword searches, and geofence searches provide new ways for governments to gather information about individuals. As these new technologies develop, the Fourth Amendment has struggled to advance alongside this new technology.

Thankfully, the Fourth Amendment is not the only protection Americans have from government intrusion. Every single state has its own state constitution and analog to the Federal Fourth Amendment. In fact, some states had their own analog amendments even before the adoption of the Federal Fourth Amendment. While oftentimes the …