United States v. Walker: Suppression Denied Where Officers Make an Isolated, Non-Grossly-Negligent Mistake in Relying on “Incorporated for All Purposes” Language to Conduct a Hit-and-Hold

1. Introduction

In United States v. Davone Walker (3d Cir. Sept. 1, 2026), the Third Circuit confronted a familiar Fourth Amendment problem with a modern twist: officers obtained judicial authorization to track a drug-laden package and to search one specified apartment if the package was opened there, but then entered a different apartment to “secure” the package after it was carried inside.

The parties were the United States (appellee) and Davone Desean Walker (appellant). The key dispute was not whether the officers’ entry into Apartment 1 was lawful—the Government conceded it was not authorized by the warrant or tracker order—but whether the remedy of suppression should apply under the exclusionary rule.

The central issue: Does an officer’s mistaken belief that a tracker order’s “incorporated for all purposes” language authorized a “hit-and-hold” entry into a secondary location amount to culpable misconduct (gross negligence or worse) warranting suppression?

2. Summary of the Opinion

The Third Circuit (Bibas, J.) affirmed the denial of Walker’s suppression motions and thus upheld his conviction. Assuming the entry into Apartment 1 violated the Fourth Amendment, the court held suppression was unwarranted because Trooper Montz’s conduct reflected, at most, an isolated mistake—not deliberate, reckless, or grossly negligent misconduct, nor systemic negligence.

The court emphasized that the exclusionary rule is “strong medicine” used to deter blameworthy police misconduct, not to penalize understandable errors—particularly where an officer relied on the order’s statement that the warrant application and affidavit were “incorporated for all purposes.”

3. Analysis

3.1. Precedents Cited

• United States v. Tracey, 597 F.3d 140 (3d Cir. 2010)
  Walker is anchored in Tracey’s practical approach to officer reliance on paperwork surrounding judicial authorization. The Walker court used Tracey to support the proposition that an officer can “understandably” believe an order is valid or sufficiently authorizing when an affidavit is attached/linked to the application—even where the face of the order is arguably deficient. Walker treats Tracey as an analogy: Montz saw “incorporated … for all purposes” language and believed the affidavit’s requested “secondary location” authority came along with it.
• Brigham City v. Stuart, 547 U.S. 398 (2006)
  Cited for the baseline rule that warrantless home entry is presumptively unconstitutional (absent exceptions), reinforcing that the court’s analysis begins with the seriousness of entering a residence without a valid warrant. Walker assumes illegality, then shifts to remedy.
• Mapp v. Ohio, 367 U.S. 643 (1961) and Weeks v. United States, 232 U.S. 383 (1914)
  These are invoked to situate the exclusionary rule historically, while underscoring the court’s modern framing: exclusion is not automatic and is justified primarily by deterrence.
• Hudson v. Michigan, 547 U.S. 586 (2006) and United States v. Leon, 468 U.S. 897 (1984)
  Walker draws from Hudson’s “last resort” language and Leon’s “substantial social costs” framing. These cases supply the court’s balancing vocabulary: even when police err, courts should not exclude evidence unless the deterrent value outweighs the costs to truth-seeking and public safety.
• Herring v. United States, 555 U.S. 135 (2009)
  Herring is the doctrinal centerpiece. Walker quotes Herring’s requirement that, “[t]o trigger the exclusionary rule,” police conduct must be sufficiently deliberate and culpable for deterrence to be meaningful and worth its price. Walker adopts Herring’s taxonomy: suppression may be appropriate for “deliberate, reckless, or grossly negligent” misconduct (and sometimes “recurring or systemic negligence”), but not for isolated mistakes.
• United States v. Vasquez-Algarin, 821 F.3d 467 (3d Cir. 2016)
  Used as a contrast case where suppression was warranted because officers acted with at least gross negligence by entering without “specific and reliable information.” Walker distinguishes Vasquez-Algarin: Montz had reliable information (GPS-monitored delivery chain and observed movement into Apartment 1) and also attempted to proceed through warrants—supporting the conclusion that his misstep was not gross negligence.
• Davis v. United States, 564 U.S. 229 (2011)
  Davis supports the court’s bottom line that the exclusionary rule does not apply when officers reasonably believe they are acting lawfully, and that isolated negligence does not justify suppression. Walker treats Davis as reinforcing Herring’s deterrence-and-culpability gatekeeping.
• United States v. Wright, 777 F.3d 635 (3d Cir. 2015)
  Cited for the Third Circuit’s articulation that deterring “isolated negligence is not worth the social cost” of exclusion. Walker uses Wright both offensively (to set the legal standard) and defensively (to reject Walker’s claim that Montz failed to read the order with “scant care”).
• United States v. Katzin, 769 F.3d 163 (3d Cir. 2014) (en banc)
  Katzin is cited to confirm the Third Circuit’s broader alignment with the Supreme Court’s restrictive approach to suppression, emphasizing that exclusion is exceptional rather than routine.
• United States v. Rosario, 180 F.4th 512 (3d Cir. 2026)
  Rosario is important for Walker’s practical lens: “Police are not lawyers.” Walker relies on Rosario to reject imposing lawyerly interpretive tools (including canons of construction) on officers when judging culpability for exclusionary-rule purposes.

3.2. Legal Reasoning

The opinion’s reasoning proceeds in two clean steps:

1. Assume a Fourth Amendment violation.
   The Government conceded that the “hit-and-hold” entry into Apartment 1 was not authorized by the warrant or tracker order. The court therefore treated the entry as unlawful, rather than expanding the substantive law of warrant authorization.
2. Decide whether suppression is an appropriate remedy.
   Applying Herring, Davis, and Third Circuit authority, the court required a showing of conduct that is deliberate, reckless, grossly negligent, or systemic. It found none.

The key factual-legal hinge was Montz’s interpretation of the tracker order’s incorporation clause: the order said the warrant application (including the affidavit) was “incorporated for all purposes.” Montz’s affidavit explicitly requested authority, if the package was taken to a “secondary location,” to “enter that secondary location and secure the package and apply for” a warrant—a “hit-and-hold.”

Although the District Court found Montz’s belief that the clause authorized entry into Apartment 1 was unreasonable as a matter of Fourth Amendment authorization, the Third Circuit agreed that this error still did not rise to gross negligence. The court stressed that culpability for suppression is a distinct inquiry: an officer can be wrong—even unreasonably wrong about the scope of authority—without being so blameworthy that exclusion’s deterrent value justifies its cost.

Walker argued that if Montz had read the tracker order carefully, he would have known it only allowed tracking, not entry. Walker also invoked expressio unius (the expression of one thing implies the exclusion of another). The court rejected both moves as setting too lawyerly a benchmark for rank-and-file police decision-making, emphasizing (via Rosario) that officers are not expected to apply interpretive canons “flawlessly and construe documents technically.”

Finally, the court distinguished scenarios that typically justify exclusion: Montz did not conduct a full evidentiary search in defiance of warrant requirements; he waited, monitored, and then secured the package before seeking a new warrant for Apartment 1, consistent with a (mistakenly assumed) pre-approved “hit-and-hold” procedure. That sequence—seeking judicial authorization before and after—supported the conclusion that his conduct was not the kind of culpable behavior the exclusionary rule aims to deter.

3.3. Impact

Walker strengthens (and clarifies) the Third Circuit’s already restrictive approach to suppression by emphasizing: (1) the separation between Fourth Amendment illegality and exclusionary-rule remedy, (2) the high culpability threshold for exclusion, and (3) the court’s reluctance to treat interpretive mistakes about incorporation language as “gross negligence.”

Likely practical effects include:

• Greater resilience of evidence against suppression where officers misread or overread judicial orders, so long as the mistake is isolated and linked to plausible features of the paperwork (e.g., incorporation clauses) rather than blatant disregard.
• Litigation focus on culpability proof: defendants will need to develop records showing recurring practices, training failures, or obvious red flags ignored—i.e., “recurring or systemic negligence”—rather than merely identifying a legal defect.
• Incentives for clearer drafting by prosecutors and issuing judges: Walker implicitly warns that ambiguity about what is “incorporated” and what operational authority is granted can lead to unlawful entries—even if evidence ultimately is not suppressed.
• Operational guidance for “hit-and-hold” tactics: agencies may treat Walker as permission to continue using hit-and-hold approaches, but only with careful, explicit judicial authorization if they want to avoid Fourth Amendment violations (even if suppression may be unlikely absent culpability).

4. Complex Concepts Simplified

Exclusionary rule

A judge-made rule that can keep illegally obtained evidence out of trial. Its primary purpose is deterrence of future police misconduct, not compensation for the defendant.

Suppression

The act of excluding evidence from use at trial because it was obtained in violation of the Constitution (typically the Fourth Amendment). Under modern doctrine, suppression is not automatic.

“Hit-and-hold”

A tactic where police enter a location to secure a package or scene (often to prevent destruction or movement of evidence) while they apply for a further search warrant, rather than conducting a full search immediately. Walker treats the initial entry as unlawful here, but still declines to suppress due to low culpability.

Tracker order / GPS tracker authorization

Judicial authorization to place and monitor a tracking device. In Walker, the order allowed continual monitoring even when the device was moved into areas protected by a reasonable expectation of privacy, but it did not expressly authorize entering residences to secure the package.

“Incorporated for all purposes”

Language indicating that an accompanying application/affidavit is treated as part of the order. Walker holds that an officer’s reliance on such language—though ultimately mistaken about authorizing entry—can still be non-grossly-negligent.

Gross negligence (in the exclusionary-rule sense)

More than ordinary carelessness; it implies serious disregard for legal requirements such that exclusion would meaningfully deter similar future behavior. Walker holds Montz’s mistake did not meet this threshold.

Expressio unius

A legal interpretive canon meaning “the expression of one thing implies the exclusion of others.” Walker declines to evaluate the officer’s conduct by expecting correct deployment of such canons.

5. Conclusion

United States v. Walker reinforces a clear Third Circuit message: even when an entry into a home is unlawful, suppression is not the default. The exclusionary rule turns on deterrence and thus on the culpability of the police conduct.

Walker’s new contribution is its concrete application of that principle to a recurring operational setting—controlled deliveries and hit-and-hold tactics—holding that an officer’s mistaken reliance on an order stating the affidavit is “incorporated for all purposes” is, at most, isolated negligence, not gross negligence. As a result, the evidence remains admissible, and suppression is reserved for more blameworthy or systemic violations.