“Reasonable” Suspicion, Reasonable Fear: ICE and the Structural Erosion of the Fourth Amendment

“We should not have to live in a country where the Government can seize anyone who looks Latino, speaks Spanish, and appears to work a low-wage job. Rather than stand idly by while our constitutional freedoms are lost, I dissent” 

— Justice Sotomayor, dissenting, Noem v. Vasquez Perdomo (2025) 

I. Introduction 

On the Friday morning of October 3rd, 2025, Chicago Alderperson Jessie Fuentes walked into Humboldt Park Health Hospital to check in on a man who had broken his leg while being chased by federal immigration agents (Heather). She approached two officers who were plainclothed and masked, refusing to provide identification. Fuentes asked whether they possessed a signed judicial warrant for the man they aimed to detain, and the agents responded by physically detaining her. “We do not need a warrant,” they stated (“Chicago Ald. Jessie Fuentes”). Leading Fuentes outside in restraints, she asked what law she had broken. The agents cited “impeding” but could articulate nothing further. The incident was filmed and condemned by most of Chicago’s City Council. But its constitutional significance extends beyond one alderperson’s brief detention. While Fuentes was released, many are not so lucky. Her experience exemplifies a pattern of eroded protections against unreasonable search and seizure that has proceeded without adequate judicial scrutiny. 

This paper argues that the last century of American constitutional jurisprudence has produced a steady diminishment of Fourth Amendment protections, accelerating across the last fifty years and reaching a critical inflection point in the post-9/11 era, driven in significant part by courts' increasing willingness to subordinate individual constitutional guarantees to the government's claimed interests in security, sovereignty, and enforcement efficiency. These accumulated judicial choices have culminated in the Immigration and Customs Enforcement’s (ICE) contemporary enforcement apparatus which is fundamentally distinct from prior expansions of police power, being distinguished by its deliberate importation of post-9/11 national security deference into immigration enforcement, the degradation of suspicion standards, the normalization of institutional architectures that bypass individualized justification entirely, and dismantled the remedial mechanisms through which violations could be challenged. As a result, ICE has become a federal enforcement system that is constitutionally unjustifiable in its methods, practically unaccountable in its operations, and judicially unreviewable in its consequences. 

Justice Sotomayor’s dissent in Noem v. Vasquez Perdomo diagnosed what the majority’s silence obscured: when enforcement proxies capture an entire demographic rather than identifying individual conduct, the Fourth Amendment ceases to function as a constraint on state power. This paper documents that diagnosis across doctrine, institutional practice, and remedial access. 

II. The Fourth Amendment Baseline 

The Fourth Amendment guarantees the “right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures.” U.S. Const. amend. IV. The provision was born from colonial-era grievances against general warrants and writs of assistance, instruments which historically permitted British officers to search homes and seize goods without individualized suspicion. Riley v. California, 573 U.S. 373, 403 (2014). The Amendment’s core function is constraint, demanding that states justify intrusions before they occur. 

For most of American constitutional history, that justification required probable cause – the requirement that officers possess sufficient factual basis to believe that a crime has been committed and that the person or place to be searched is connected to it. The warrant requirement operationalized the probable cause standard by assigning its determination to magistrates, not officers. Together, these requirements created friction: the state could not simply seize people based on appearance or generalized suspicion; they had to articulate facts, subject them to neutral review, and obtain preauthorization before acting. Under the Fourth Amendment, a “seizure” occurs when a reasonable person would not feel free to leave or decline an officer's request — a standard that applies in both civil and criminal proceedings, and whose significance will become clear as this paper develops. 

The significance of this architecture is that the Fourth Amendment serves as a legitimacy mechanism, signaling that state power operates through law rather than prejudicial stereotypes. So, as these constraints have slowly eroded, the consequences begin to extend beyond individual rights violations to something broader: a fundamental restructuring of the relationship between state power and constitutional accountability – changes that I will document across three dimensions in this paper. 

III. Dimension One: Degraded Suspicion Standards 

The first dimension of degradation concerns the suspicion standard itself: the progressive judicial lowering of the evidentiary threshold required to justify a stop, and the resulting use of ethnicity, language, and demographic indicators to substitute for particularized facts. Terry v. Ohio, 392 U.S. 1 (1968), marked the decisive turn, in which the Fourth Amendment – one which operated on a binary of officers either possessing probable cause or holding no authority for seizure – shifted to formally authorizing a “sub-probable-cause” category for the first time, a departure that Justice Douglas flagged in dissent as granting police “greater power than a magistrate,” Id. at 38 (Douglas, J., dissenting). The Court held that police may briefly “stop and frisk” if an officer simply possesses “reasonable suspicion” that a possible criminal act might have been committed, a classification which lowered the threshold for policing “where [an officer] has reason to believe that he is dealing with an armed and dangerous individual, regardless of whether he has probable cause to arrest.” Such assumptions were further outlined when officers were given the legal backing to justify “specific reasonable inferences which he is entitled to draw from the facts in light of his experience.” Id. at 27. In practice, this classification shifted the burden toward civilians and expanded police discretion—creating a presupposition that officer-purported information was indeed fact—well past the Fourth Amendment’s original design, resulting in flagrant violations of liberties in the name of officer protection under a loose standard of which “a reasonably prudent man…would be warranted in the belief that his safety or that of others was in danger.” Id. at 27. 

Whren v. United States, 517 U.S. 806 (1996), marked the second shift. The Court held that pretextual stops—where an officer uses a minor infraction as legal justification to detain someone they are actually targeting for unrelated reasons, most commonly illustrated through traffic violations—are constitutional if an objective probable cause exists for a violation, regardless of the officer’s subjective motive. “Subjective intentions play no role in ordinary, probable-cause Fourth Amendment analysis.” Id. at 813. The decision severed the Fourth Amendment doctrine from the question of why enforcement was directed at a particular person. Profiling concerns are instead displaced to the Equal Protection doctrine—applicable to federal actors such as ICE through the Fifth Amendment’s Due Process Clause—which requires a much more substantial burden of proof of “discriminatory intent,” as outlined in Washington v. Davis, 426 U.S. 229 (1976), and Village of Arlington Heights v. Metropolitan Housing Development Corp., 429 U.S. 252 (1977), a plaintiff must show that a policy was adopted because of its racial impact, not merely in spite of it—a threshold so demanding that nearly all profiling claims fail to clear it. 

The combined effect of Terry, subjugating profiling claims from the Fourth to the Fifth Amendment under the Equal Protection Clause, and Whren, almost entirely nullifying Equal Protection, creates a doctrinal architecture that tolerates and naturally purports proxy-based enforcement. This dynamic is nowhere more consequential than in immigration enforcement, where legal status cannot be visually determined, shifting policing practices towards the utilization of aforementioned factors such as language and ethnicity. United States v. Brignoni-Ponce, 422 U.S. 873, 886–87 (1975), established this trajectory by positioning “Mexican appearance” as a “relevant factor” in the reasonable suspicion analysis for roving border patrol stops. That permission opened opportunities for agencies like ICE to treat Latino appearances as partial justification, awaiting only supplemental facts to satisfy the already-lowered standard. 

Noem v. Vasquez Perdomo, 606 U.S. ___ (2025), arrived on the Court’s emergency docket after a federal district court enjoined ICE from conducting such roving stops where reasonable suspicion relied solely on race, use of Spanish, or low-wage occupation status. The Supreme Court, 6–3, stayed the injunction—reversing the lower court’s decision—without a full merits briefing, oral argument, or reasoned majority opinion. Justice Kavanaugh wrote a solo concurrence emphasizing the government’s “fair prospect” of success, but Justice Sotomayor’s dissent documented what the majority’s silence erased: armed and masked agents pulling up to car washes, farms, bus stops, and seizing individuals on sight before asking a single question. Her dissent’s constitutional force lies in its diagnosis: if “reasonable suspicion” is constructed from language, phenotype, and occupation, then suspicion becomes indistinguishable from prejudicial stereotyping. Citizens including Jorge Viramontes, a U.S.-Mexican dual citizen detained after providing identification, and Jason Brian Gavidia, a U.S. citizen working at a tow yard in Montebello, California, illustrate that this is a citizen as well as a noncitizen problem. When agents approached Gavidia, they demanded he state the city and hospital in which he was born, and when he could not immediately recall, agents threw him against a metal gate and twisted his arm rather than initiating the verification procedures their own internal directives required. Gavidia then attempted to present his REAL ID—a federally standardized identification document established under the REAL ID Act of 2005, 49 U.S.C. § 30301, which, while not conclusive proof of citizenship, does confirm the legality of the holder's presence in the United States at the time of issuance—but agents confiscated it instead. Gavidia watched as agents slammed his friend to the ground, leaving him bleeding from his forehead, and described the moment an ICE agent chambered a round into his AR-15 and turned to face him as he considered intervening: "I see my friend stating that he's an American, he gets slammed to the floor, [and] he's bleeding from his forehead. I want to jump in, I want to defend my friend, [but] an ICE agent looks at me [and] racks a round into his AR-15. I can't win that battle" (Pozen, "LA County Man"). Gavidia was only released after his friend began filming the encounter. His REAL ID was never returned (Pozen; Noem, slip op. at 2–3). 

IV. Dimension Two: Architectural Normalization 

Where the first dimension concerns what threshold of suspicion courts require, the second concerns what happens when enforcement is designed so that the question of individualized suspicion never meaningfully arises – normalizing, through institutional practice and judicial deference, a process by which practices that deviate from the constitutional baseline become so structurally embedded in enforcement institutions that their unconstitutionality is obscured by their routine, and each successive departure from the Fourth Amendment's individualized suspicion requirement makes the next one easier to authorize until the exception displaces the rule entirely. Checkpoints stop everyone; ICE operations stage “voluntary” interactions backed by armed coercion; anonymity practices sever accountability; and algorithmic targeting designates neighborhoods rather than individuals. 

United States v. Martinez-Fuerte, 428 U.S. 543 (1976), upheld fixed immigration checkpoints that stop and question motorists without any individualized suspicion. The holding rested on a balancing test: because the intrusion was “minimal” and the government’s interest was “substantial,” suspicionless questioning was authorized, which systematically demonstrated the shift from the Fourth’s importance on individualized justification for questioning. Id. at 557–62. In INS v. Delgado, 466 U.S. 210, 218 (1984), agents positioned themselves near factory exits while others questioned workers in “surveys.” The Court held this was not a seizure, negating the implicit coercion present from the armed agents that blocked exits and used intimidation tactics, in effect treating refusal as guilt. Each of these holdings reflects a broader institutional logic: that the government's interest in enforcement, once framed as a matter of national security, operates as a near-automatic counterweight to constitutional constraint—a migration of justification this paper addresses directly in Section V. 

Agent anonymity has accelerated this normalization. While federal regulations require immigration officers to identify themselves and state the reason for an arrest “as soon as it is practical and safe to do so,” a standard which has increasingly been ignored (Cameron and Haskins). ICE officers wearing masks, operating in plainclothes, and refusing to display identification has become common practice, and as Alycia Castillo of the Texas Civil Rights Project has observed, “The recent increased presence of armed, masked federal officers completely disrupts and erodes public trust in law enforcement” (Cameron and Haskins). That erosion has enabled criminal exploitation: in November 2025, the FBI issued a bulletin warning that criminals were impersonating ICE agents to commit robberies, kidnappings, and sexual assaults. In Raleigh, a man presented a fake badge and threatened deportation to coerce a woman into sexual compliance; in Bay County, Florida, a woman was abducted by an individual portraying an ICE operative with nothing more than a verbal claim of authority (Cameron and Haskins). This trajectory from using fake badges to no badge signals a dangerous pattern: when real agents routinely operate without identification, the claim to authority alone compels compliance, in turn empowering impersonators and negating the protections inherent with anonymous enforcement, as the common citizen becomes ever more skeptical of the authority that hides behind the mask. 

Algorithmic targeting represents the most advanced form of this normalization. In January 2026, investigative reporting revealed ICE’s use of a Palantir-developed tool called ELITE (Enhanced Leads Identification & Targeting for Enforcement), which uses data from the Department of Health and Human Services to create maps with “confidence scores” that grade potential deportation target areas for their likelihood of holding illegal aliens (Cox; Electronic Frontier Foundation). Sworn testimony from anonymous ICE Officer “JB” explained the logic in practice, stating, “you’re going to go to a more dense population…if there’s one pin at a house and the likelihood of them actually living there is like 10 percent…you’re not going to go there” (Officer “JB,” M-J-M-A v. Wamsley, as reported in Cox). Agents no longer ask “why this person?” but “why this neighborhood?” This, alongside ICE’s incentivization through daily arrest quotas—Officer “JB” testified that teams were expected to produce eight arrests per day—has transformed individualized suspicion into an obstacle for meeting daily arrest targets. This transformation has effectively gutted the Fourth Amendment’s function from a constraint the state must satisfy, to a bureaucratic inconvenience to be bypassed in service of raw arrest counts. 

V. The National Security Migration 

To understand how enforcement of this kind became possible, one must look back to the event that reshaped the boundaries of American governance: the attacks of September 11th. In the wake of the attack, the public’s grief and rage relegated constitutional constraint as an acceptable casualty for achieving national security; a practice which quickly took fold in operations such as the National Security Agency’s Terrorist Surveillance Program which monitored thousands of domestic communications (Risen and Lichtblau), the New York City Police Department’s intelligence efforts on more than 250 mosques (Apuzzo and Goldman), and the Federal Bureau of Investigation's newly built network of over 15,000 registered informants—roughly three times its pre-9/11 total (Aaronson). The judiciary eventually reasserted oversight—Rasul v. Bush, 542 U.S. 466 (2004), Hamdi v. Rumsfeld, 542 U.S. 507 (2004), and Boumediene v. Bush, 553 U.S. 723 (2008), each pushed back against unchecked executive detention. Though the institutional model was now clear: the state pushed first, normalizing the practice and only later correcting after sustained litigation. 

That same model has now been deliberately imported into immigration enforcement. Former DHS Secretary Kirstjen Nielsen declared that “border security is homeland security, which is national security” (Nielsen), while Border Czar Tom Homan testified that conditions at the border represented “the biggest national security failure I have seen since 9/11” (Homan). This rhetorical migration is completely intentional—by classifying immigration enforcement as a national security matter, the Executive activates the same judicial deference framework that allowed the post-9/11 institutional model to operate unchecked: push first, normalize through repetition, and rely on the friction of sustained litigation to slow any correction. Doctrines like Ziglar's "special factors" are used to foreclose constitutional remedies before they are ever examined, ensuring that the apparatus remains insulated from judicial scrutiny by the time any challenge reaches a court capable of addressing it. 

However, the parallel between the zeitgeists of post-9/11 America and contemporary immigration enforcement fails on one crucial structural difference. The national security state post-9/11 was triggered by a catastrophe on a specific date, creating a temporal metric for reevaluating the legitimacy of rights violations. As the threat of subsequent attacks diminished and public opinion shifted, the courts reasserted oversight and restored rights, such as habeas corpus in cases like Boumediene v. Bush. Immigration enforcement, however, lacks this temporal structure entirely, as the so-called “border crisis” is an ongoing phenomenon with no natural start or endpoint, creating a dangerous ongoing condition that potentially allows national security framing to treat rights violations as a permanent state of exception with no mechanism for reversion. Thus, if the emergency never ends, the deference will never contract. The resulting constitutional constraints suspended in the name of security will never be restored, and the rights of citizens and noncitizens alike will permanently be subordinated to an enforcement apparatus that has every incentive to ensure the emergency continues. 

VI. Dimension Three: Remedy Collapse 

A right without viable recourse is more akin to a statement of values than a true legal doctrine. The primary mechanism for enforcing Fourth Amendment rights in criminal proceedings is the exclusionary rule, first established in Weeks v. United States, 232 U.S. 383 (1914), and extended to state courts in Mapp v. Ohio, 367 U.S. 643 (1961). The rule protects victims from unconstitutional searches by making illegally obtained evidence inadmissible in court. 

However, ICE operates almost exclusively through civil removal proceedings and not criminal prosecution, leaving a gap which was demonstrated in INS v. Lopez-Mendoza, 468 U.S. 1032 (1984), a case that determined that even when an arrest violates the Fourth Amendment, deportation may still proceed. With no criminal case, there is no merit to determining the constitutionality of an agent’s conduct, leaving only one mechanism for recourse: Bivens. 

Under 42 U.S.C. § 1983, individuals can sue state and local officials for constitutional violations. For federal officials, that remedy has been Bivens v. Six Unknown Named Agents, 403 U.S. 388 (1971), in which the Court held that the Constitution implicitly authorizes compensatory relief against federal officers who violate the Fourth Amendment. As Justice Brennan wrote, “for people in Bivens’s shoes, it is damages or nothing.” Id. at 410. Bivens represented the last viable pathway, one which the Courts have spent the last decade dismantling. 

Ziglar v. Abbasi, 582 U.S. 120, 135 (2017), announced that extending Bivens to new contexts is a “disfavored” judicial activity, holding that national security and immigration enforcement implicate “special factors counseling hesitation.” This framing is a direct product of the national security migration: once immigration enforcement is characterized as adjacent to national security, the “special factors” are automatically present in every immigration case. Hernandez v. Mesa, 589 U.S. 93 (2020), expanded this to protect an agent that shot and killed a child that stood on the Mexican side of the border. Egbert v. Boule, 596 U.S. 482 (2022), expanded this to protect agent’s violent actions, even when they were elicited from a U.S. citizen’s plea for the agent to leave a private establishment that was owned and operated by Robert Boule. In both cases, defendants pursued damages suits against the agents but were denied by the Courts, stating that Congress is “better suited to ‘weigh the costs and benefits.’” Ziglar quoted in Egbert. 

The legitimacy problem compounds the remedial one. When enforcement decisions are driven by opaque algorithmic systems—such as a person seized in an ELITE-directed operation—the system becomes functionally unreviewable by inhibiting access to the data underlying their targeting or the criteria by which the algorithm weighted it. Trade secrecy protections as outlined in People v. Johnson, No. F071640 (Cal. Ct. App. 2019), upheld that nondisclosure of predictive policing algorithms outweighed the importance of upholding the defendant’s due process right to examine the evidentiary basis for his targeting. This reliance on proprietary systems for enforcement is further explored in an article from the University of Michigan’s Law Review, illustrating how the Brady v. Maryland obligation is structurally inverted. This structural inversion is seen in the obligation’s requirement of prosecution to disclose favorable material evidence to the defense, as defendants cannot determine whether favorable evidence exists; as such, algorithms are protected under the Johnson decision (“The Missing Algorithm”). This inversion of the Fourth Amendment completely negates its intended protections, creating a practical effect of impunity by design. 

VII. Counterargument and Response 

To be truly fair in its assessment, this paper explores the Court’s and Executive’s substantive justifications for the deference that characterizes modern-day immigration enforcement. 

The most foundational objection is doctrinal. Under the plenary power doctrine, the federal government possesses inherent authority over immigration derived from national sovereignty, which has historically relegated the subject to minimal judicial review. The argument follows that Fourth Amendment constraints must yield to the demands of immigration control. The Supreme Court has affirmed and expanded this authority across three cases that represent a deliberate factual escalation of the doctrine's reach. Chae Chan Ping v. United States, 130 U.S. 581, 609 (1889), established its foundation in the context of racial exclusion legislation directed at Chinese nationals, holding that immigration concerns are "largely immune from judicial control." Shaughnessy v. Mezei, 345 U.S. 206, 210 (1953), extended it to its most extreme application, permitting the indefinite detention of a lawful permanent resident of twenty-five years on undisclosed national security grounds with no hearing and no judicial remedy. Fiallo v. Bell, 430 U.S. 787, 792 (1977), then reaffirmed the doctrine even where the Court explicitly acknowledged the discriminatory nature of the classification at issue, subordinating equal protection analysis entirely to congressional immigration authority. Moving from exclusion to indefinite detention, to court-acknowledged discrimination, the cumulative trajectory of these three cases illustrates a dangerous expansion of the doctrine that the government now invokes to argue that the Fourth Amendment's ordinary constraints must yield entirely to the unique demands of immigration control. 

However, these cases and their arguments conflate two distinct categories of governmental authority: Plenary power granted to the Executive and Legislative branches, which govern substantive immigration decisions on who may enter the country, who may remain, and on what conditions, and the power of the judiciary to invoke the power of constitutional scrutiny. The Executive and Legislative branches, and the Plenary power that’s afforded to them, have never been exempt from the constitutional scrutiny that questions the enforcement mechanisms through which those decisions are carried out. Justice Frankfurter drew this line explicitly in Galvan v. Press, 347 U.S. 522, 530–31 (1954): while “the formulation of these policies is entrusted exclusively to Congress,” enforcement “must respect the procedural safeguards of due process.” The Court reaffirmed this boundary in Arizona v. United States, 567 U.S. 387 (2012), striking down state enforcement measures that conflicted with the executive’s intent behind immigration enforcement policy, confirming that even enforcement designed to further federal immigration objectives must operate within constitutional bounds. In practice, every major Fourth Amendment immigration case discussed—Brignoni-Ponce, Martinez-Fuerte, INS v. Delgado—has applied standard Fourth Amendment analysis to enforcement methodology without invoking plenary power as a basis for exemption. Extending plenary power to override enforcement methodology would render the Fourth Amendment inapplicable to all federal action that the government chose to characterize as implicating foreign affairs or national security, an absolute power that would operate beyond constitutional scrutiny in any context. No court has endorsed such a proposition. 

The second objection is operational. Interior immigration enforcement at scale requires some reliance on contextual factors as the legality of a person’s status cannot be visually determined. Prohibiting any consideration of demographic characteristics would render enforcement operationally impossible, a position that draws support from Brignoni-Ponce which acknowledged that “Mexican appearance” constitutes a “relevant factor” in the reasonable suspicion analysis, 422 U.S. at 886–87, and from Justice Kavanaugh’s concurrence in Noem, which endorsed ethnicity as probative “when considered along with other salient factors.” 

This argument has surface plausibility in the narrow context for which it was originally developed: roving Border Patrol stops within miles of the physical border, where demographic composition differs substantially from the interior. However, this geographic limitation has not been recognized in practice. The Ninth Circuit described the demographic reasoning underlying the 1970’s Brignoni-Ponce case as “now-outdated,” while the Tenth Circuit in United States v. Monsisvais, 907 F.2d 987 (10th Cir. 1990), rephrased Brignoni-Ponce, omitting “Mexican appearance” entirely—a tacit recognition that the statistical predicate that justified its inclusion at the border failed to extend into the interior United States, the modern enforcement terrain ICE now predominantly operates. While lower courts have narrowed Brignoni-Ponce’s interpretation, such limitations have operated within the bounds of Brignoni-Ponce rather than against it. Demonstrated by Kavanaugh’s citation in Noem, the Supreme Court has demonstrated an unwillingness to revisit and reinterpret the case’s applications. The result is a doctrine that lower courts have simultaneously eroded from below by recognizing its failures in evolving demographic reasoning, while also being reaffirmed from the Supreme Court, which has failed to confront that erosion directly, resulting in Brignoni-Ponce’s maintained formal authority. 

Moreover, the practical necessity argument cannot account for the institutional practices documented in the preceding sections. Agent anonymity, algorithmic neighborhood targeting, and the elimination of identification standards serve as operational conveniences, not necessities—serving to maximize enforcement volume even when it’s conducted at the expense of constitutional compliance. Sworn testimony from Officer “JB” in M-J-M-A v. Wamsley has already established the incentive structure that drives these operations. “JB’s” testimony exposes a structural contradiction at the heart of the practical necessity argument: the government claims constitutional constraints prevent effective and legitimate enforcement. In reality, the quota-driven structure holds culpability, treating Fourth Amendment considerations as impediments to the ultimate goal: not public safety, but rather the ever more illustrious quota. 

The third objection challenges the judiciary’s institutional role. Baker v. Carr, 369 U.S. 186 (1962), arose in an entirely unrelated context, in which Charles Baker—former mayor of Millington, Tennessee—challenged the state’s failure to redraw its legislative districts since 1901, citing the Tennessee state constitution, which required districts that had significant population shifts to do so. He argued this failure diluted urban voting power in violation of the Equal Protection Clause, but the District Court for the Middle District of Tennessee saw it differently, dismissing the challenge as a nonjusticiable political question. The Supreme Court reversed the decision, articulating six categories under which a case presents a nonjusticiable political question—a framework developed entirely outside the immigration context—the most consequential of which for immigration enforcement is the classification of "a textually demonstrable constitutional commitment of the issue to another branch." The government borrows this framework and layers it on top of the plenary power lineage established in Chae Chan Ping, arguing that immigration enforcement represents precisely such a commitment, one constitutionally reserved for executive judgment about foreign policy, resource allocation, and national security. The combination of plenary power and the Baker non-justiciability framework, therefore, produces the government's broadest claim of which questions pertaining to immigration enforcement are categorically beyond judicial reach. 

This objection misidentifies what is being challenged. The government's non-justiciability argument assumes that because the Executive holds broad authority over immigration enforcement priorities, the methods through which that enforcement is conducted are equally beyond judicial reach. These are two constitutionally distinct questions, and conflating them is the objection's fatal flaw. 

United States v. Texas, 599 U.S. 670 (2023), draws the line precisely. When Texas challenged the Biden administration's internal guidelines directing agents to prioritize certain categories of immigrants for arrest—suspected terrorists, serious criminals, and recent border crossers—the Supreme Court held that the courts do not have the power to order the Executive to restructure its enforcement priorities, and that the authority belongs to the Executive alone. The Court's holding was carefully bounded: it addressed only the question of who ICE targets, not how agents conduct themselves once a target has been identified. The constitutionality of the methods through which arrests are carried out—whether agents had reasonable suspicion, whether they identified themselves, whether they operated within constitutional bounds—was left entirely untouched by the Texas decision, showcasing that indeed plenary power remains with the Executive, but only to a limited capacity. 

Every major Fourth Amendment immigration case this paper has discussed—Brignoni-Ponce, Martinez-Fuerte, and Noem—was adjudicated on the merits of enforcement methodology rather than dismissed as a nonjusticiable political question. The fact that courts have repeatedly reached the merits in these cases is itself an implicit concession that how immigration enforcement is conducted remains squarely within the judiciary's constitutional authority to review. The government cannot invoke Baker and Chae Chan Ping to immunize the Executive's enforcement priorities and then extend that immunity by implication to cover every constitutional violation that occurs in the process of carrying those priorities out. 

As demonstrated in Zivotofsky v. Clinton, 566 U.S. 189, 196 (2012), a case which addressed the Executive’s exclusive right to recognize a country’s sovereignty, the courts established a “narrow exception” standard, which determined that the Court’s involvement could extend to matters where the Executive held absolute authority. This finding further nullified any claims that the Executive’s authority over immigration was absolute and immune from judicial scrutiny. For the Courts to assign sweeping immunity for actions of the Executive, it would accept a framing that makes constitutional rights contingent on the Executive’s willingness to self-govern and respect them, another notion that the Court has repeatedly declined to accept. 

The final objection addresses remedial action directly. Qualified immunity, as intended, appropriately protects officers who make reasonable judgments under uncertain conditions. The Bivens retrenchment reflects a legitimate institutional judgment that Congress, not the judiciary, should create remedial avenues in sensitive enforcement contexts. As the Court stated in Egbert, Congress is “better suited to ‘weigh the costs and benefits of allowing a damages action to proceed.’” 

However, in the current political sphere with its historical levels of division, coming to a consensus for such an issue has become largely impossible. In the context of Bivens’ foreclosure by Ziglar, Egbert, and Hernandez, alongside the exclusionary rule’s inapplicability in civil deportation proceedings under Lopez-Mendoza, no criminal trial means there’s no threat of evidence suppression. Thus, these cases have collectively created a web in which each case holds its own internal justifications for limiting defendant protections when considered in isolation. However, collectively, this web has left gaps, a convergence that produced a system in which no federal immigration enforcement officer carries any personally enforceable consequences. 

The Egbert Court’s own directive towards Congress implicitly acknowledges that the current status quo provides no adequate remedy, serving as an invitation for the only remaining formal pathway, legislation. The Federal Tort Claims Act (FTCA) (28 U.S.C. §§ 1346(b), 2671–2680) permits suits against the government for assault, false imprisonment, and related torts by federal investigative officers. But the FTCA is structurally inadequate, as it directs liability at the institution rather than the individual officer, providing no personal deterrent against unconstitutional conduct by barring personal punitive damage claims against agents. It precisely shields the officer-level enforcement decisions that produce the violations this paper documents, specifically providing greater protections to immigration enforcement agents by requiring a two-year administrative exhaustion requirement. This makes claims a practical impossibility for many of those who have been directly affected. Individuals who have been detained, transferred, and deported often cannot satisfy procedural prerequisites from outside the country, meaning that remedies are extinguished before they can ever be pursued. 

Each of these objections identifies legitimate governmental interests: sovereignty, operational efficacy, executive discretion, and officer protection. Nonetheless, none of these elements can justify the specific convergence that this paper has documented. The government has every right to enforce immigration law as permitted by the Constitution, but when such enforcement becomes functionally unreviewable, practically unaccountable, and systematically directed by demographic proxies rather than individualized facts, the Fourth Amendment cannot bend to accommodate it; it can only break—and with it, any constitutional guarantees that state powers must justify themselves before it acts. 

VIII. Restoring the Fourth Amendment 

If the diagnosis is structural degradation across doctrine, practice, and remedy, repair must address all three dimensions. 

Doctrinal repair requires courts to clarify that ethnic and linguistic proxies cannot satisfy reasonable suspicion in demographically diverse environments. Concretely, courts should adopt a presumption against reliance on language, appearance, or occupation as evidence in the absence of observed individualized conduct. Such a standard would confine Brignoni-Ponce’s partial permission of such usage to its border-patrol origins rather than importing it into interior enforcement, an especially important standard in cities with large Hispanic populations, such as Los Angeles. As the Supreme Court held in Yick Wo v. Hopkins, 118 U.S. 356, 369 (1886), constitutional protections “are universal in their application, to all persons within the territorial jurisdiction, without regard to any differences of race, of color, or of nationality; [as] the equal protection of the laws is a pledge of the protection of equal laws.” 

Legislative repair would seek to address the void left by the Egbert Court, eliciting Congress to create a specific statutory damages pathway for Fourth Amendment violations by federal immigration officers. A Federal Officer Accountability Act could authorize suits against individual officers who clearly violate Fourth Amendment rights in immigration enforcement contexts, limiting exhaustion requirements to account for timelines of the pursuant’s probable deportation or clearly outlining explicit avenues for afflicted parties to pursue damages suits following their removal from the United States.  

However, such legislation would also need to carefully strike a balance between the accountability of agents, with operational protection that their position requires, making it a necessity to implement caps for punitive damages, qualified defenses for good-faith reliance on valid warrants or supervisor directives. It would additionally need to ensure the safeguarding of agents who demonstrate adherence to newly-instituted protocols—body cameras, presenting identification upon request, etc., granting insulation for agents acting in genuine compliance from personal liability while preserving accountability for agents that deviate from constitutional standards. Bills like the Protecting Sensitive Locations Act, H.R. 1061, 119th Cong. (2025), which restrict enforcement near hospitals, schools, and places of worship, represent possible first steps in this remedial process. Legislative repair should also seek to address the Equal Protection gap by adopting a disparate impact standard for federal enforcement operations, closing the intent requirement that Washington v. Davis first erected. 

Administrative repair would require the Executive to shift current directives away from policies which actively purport constitutional violations in the name of immigration enforcement. Executive Order 14159, “Protecting the American People Against Invasion,” signed by President Trump on his first day of office, broadly designates all removable noncitizens as enforcement priorities, expands removal into the interior United States, and directs the sweeping expansion of ICE operations. The order illustrates the political reality that this administration's stated objectives directly counter the kind of constitutional restraint this paper proposes. Any call for administrative repair that amounts to limiting interior enforcement will find no receptive audience in an Executive that has staked its political identity on maximizing it. 

However, this paper’s proposed repair methodology articulates a shift away from such violations in a manner that still somewhat aligns with the current administration’s objectives, doing so by replacing reward metrics from being quota-driven to accuracy-driven. This revised shift would instead reward operatives and broader ICE operations for successfully identifying and capturing individuals with active removal orders, in turn using metrics that display the accuracy of their detentions, rather than raw arrest counts. Such an avenue would provide the current Executive, President Trump, an opportunity to continually purport immigration statistics in a manner that retains the ultimate goals of current immigration rhetoric, while also realigning the institutional incentives of ICE to uphold Fourth Amendment obligations and the law as a whole, which the Executive is equally bound to uphold. 

IX. Conclusion 

The argument of this paper is not that immigration law cannot be enforced. It is that constitutional rights cannot survive when enforcement operates through demographically driven systems, when agents act anonymously, when algorithms target neighborhoods rather than individuals, and when courts refuse to provide remedies even for acknowledged violations. 

Alderperson Fuentes asked a simple question of “Do you have a warrant?” and was handcuffed for it. Not for resisting, but simply for asking. Her story illustrates the lived consequence of doctrinal erosion: when the right to demand constitutional compliance becomes a punishable act, the right itself has already been lost. The Fourth Amendment is supposed to provide a structural guarantee of protections to all persons against arbitrary arrests, searches, and seizures—one which operates regardless of the identity of the person invoking it and holds firm no matter the context in which the state chooses to act, whether that context is framed as a national security emergency, an immigration crisis, or any other invocation of executive necessity designed to place enforcement beyond constitutional reach. What remains today is its shadow, leaving behind the task now to rebuild what has been lost. 

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