General FBI–Foreign Cooperation Is Not Enough: Specific Allegations of U.S. Control or Substantial Participation Are Required to Earn a Suppression Hearing Under the “Joint Venture” Doctrine

1. Introduction

In United States v. William Michael Spearman (11th Cir. 2026), the Eleventh Circuit addressed two questions arising from an FBI investigation into a large Tor-based child-pornography network (“Website A”): (1) whether the district court had to hold an evidentiary hearing on Spearman’s suppression motion premised on foreign-law-enforcement acquisition of a Tor-masked IP address; and (2) whether a life sentence was substantively unreasonable given extensive mitigation evidence.

The suppression dispute turned on how a foreign law enforcement agency (“FLEA”) obtained the IP address and whether the FBI’s relationship with the FLEA was close enough to treat the foreign action as a U.S. search under the Fourth Amendment “joint venture”/“silver platter” line of cases. Spearman argued he could not know the details without a hearing; the government argued his allegations were speculative and legally insufficient even if assumed true. The panel majority affirmed; Judge Kidd dissented on the hearing issue.

2. Summary of the Opinion

A. Suppression hearing

  • The court reaffirmed that a district court need not hold a suppression hearing unless the motion alleges “sufficiently definite, specific, detailed, and nonconjectural” facts that, if proven, would provide a basis for relief.
  • Applying foreign-search doctrine, the court held Spearman did not plausibly allege facts showing the FBI substantially participated in the FLEA’s search or that the FLEA acted as an agent of the FBI—requirements associated with the “joint venture” exception.
  • Spearman’s alternative theory—raised for the first time on appeal—that any foreign search “on American soil” is automatically subject to the Fourth Amendment failed under plain-error review because Eleventh Circuit/Supreme Court precedent did not directly resolve that issue.

B. Sentencing

  • The court held Spearman’s within-guidelines life sentence was substantively reasonable.
  • It emphasized deference to the district court’s balancing of § 3553(a) factors, and found the sentencing judge adequately considered Spearman’s military service, PTSD and other mental-health evidence, and asserted low recidivism risk.

3. Analysis

3.1. Precedents Cited

(a) Threshold for an evidentiary hearing on a suppression motion

  • United States v. Cooper — supplied the abuse-of-discretion standard for denying a suppression hearing.
  • United States v. Richardson — provided the controlling requirement that a motion must allege facts which, if proven, would provide a basis for relief; otherwise no hearing is required.
  • United States v. Smith — articulated the classic “definite, specific, detailed, and nonconjectural” standard (as binding former Fifth Circuit law via Bonner v. City of Prichard).

These cases framed the majority’s core move: treat the hearing request as a pleading sufficiency question. The panel did not ask whether a hearing would be useful; it asked whether Spearman’s factual proffer—assumed true—would legally establish a Fourth Amendment violation.

(b) Foreign-obtained evidence, “silver platter,” and the “joint venture” exception

  • United States v. Emmanuel — stated the “general rule” that foreign-official searches in their own countries do not implicate the Fourth Amendment.
  • Lustig v. United States — the “silver platter” concept: evidence is treated as federally obtained if a federal official “had a hand in it.”
  • United States v. Behety and United States v. Frank — identified exceptions: (1) “shocks the judicial conscience,” and (2) a “joint venture” where U.S. officials substantially participate or the foreign officials act as U.S. agents.
  • United States v. Rosenthal, Stonehill v. United States, and United States v. Morrow — illustrated that cooperation, information sharing, and even some U.S. presence or assistance may still fall short of a joint venture.
  • Byars v. United States — supplied the animating anti-circumvention principle: U.S. officers may not use “circuitous and indirect methods” to evade constitutional constraints through others.

The majority used these cases to draw a sharp line: transnational “normal lines of communication” and even technology/username sharing are generally “cooperation,” not “agency.” To cross the line, allegations must support U.S. control, direction, or substantial participation in the foreign search itself.

(c) Plain-error limits on new Fourth Amendment theories

  • United States v. Young and United States v. Bruce — established that suppression theories not raised below are reviewed for plain error.
  • United States v. Madden — reiterated that error must be “obvious and clear under current law.”
  • United States v. Lejarde-Rada — made dispositive the Eleventh Circuit rule that there is no plain error absent controlling Supreme Court or Eleventh Circuit precedent directly resolving the issue.

These cases drove the panel’s refusal to reach, as “plain,” the unresolved question whether a foreign sovereign’s search on U.S. soil always triggers the Fourth Amendment exclusionary rule.

(d) Sentencing deference and within-guidelines reasonableness

  • United States v. Butler, United States v. Hunt, and United States v. Irey — supplied the abuse-of-discretion framework and reinforced deference to a district court’s weighing of § 3553(a) factors; within-guidelines sentences are “ordinarily” expected to be reasonable.
  • United States v. Sanchez — supported affirming a life sentence in child-sex crimes despite military-service mitigation.
  • Porter v. McCollum — was distinguished as a case about ineffective assistance for failing to present mitigation, not about whether a sentencing court must credit mitigation once presented.

(e) Contextual citations

  • McMorris v. Carlos Lopez & Assocs., LLC — used only to define the “dark web,” not as a substantive Fourth Amendment authority.
  • United States v. Holmes and Murray v. United States — provided general Fourth Amendment warrant/exclusionary-rule background.
  • The dissent additionally cited United States v. Conroy (joint venture concerns), and discussed limited criminal discovery referencing Weatherford v. Bursey, Weeks v. United States, and Elkins v. United States, along with Brady v. Maryland and Giglio v. United States, to argue a suppression hearing is often the only practical tool to develop Fourth Amendment facts.

3.2. Legal Reasoning

(a) The “hearing entitlement” inquiry is front-loaded

The panel treated the request for a hearing as governed by Richardson/Smith: no hearing is required unless the defendant alleges concrete facts that—if proven—would warrant suppression. This “assume true, but ask whether it matters” approach is crucial, because it allows denial of a hearing even where facts are unknown, so long as the defendant’s proffer is speculative or does not establish the elements of the legal exception invoked.

(b) Cooperation vs. “joint venture”

The majority accepted, for argument’s sake, that offensive code may have been required and that information/technology may have been shared. It still found the allegations insufficient because they did not plausibly show the FBI (i) directed the search, (ii) controlled the FLEA, (iii) substantially participated in execution, or (iv) used the FLEA as a conduit to do something the FBI could not constitutionally do itself. The court also invoked ordinary agency concepts (citing Whetstone Candy Co. v. Kraft Foods, Inc.) to underscore that agency requires control.

In short, the opinion tightens the practical meaning of “hand in it” from Lustig v. United States in this context: a “hand” must be more than parallel investigation, shared interests, shared tools, or post hoc receipt of results. The allegations must connect U.S. officials to the foreign act in a way that makes the foreign search functionally a U.S. search.

(c) The “search on American soil” theory was procedurally barred by plain-error doctrine

The panel did not decide the merits of whether foreign sovereign searches conducted in the United States are always governed by the Fourth Amendment. Instead, because the argument was not raised below, the panel applied plain-error doctrine and held there could be no “plain” error without precedent directly resolving the issue. The practical effect is that defendants must preserve novel foreign-search theories in the district court or risk near-automatic loss on appeal.

(d) Sentencing: “considered” does not mean “credited”

On mitigation, the court emphasized that a district court’s acknowledgment that it considered § 3553(a) factors and the parties’ arguments is enough; the court need not discuss every mitigating point or assign it the weight the defendant prefers. Against the record of extreme offense conduct, leadership role, and deterrence/public-safety concerns, the panel found no clear error of judgment in choosing a guidelines life sentence.

3.3. Impact

(a) Future suppression litigation in cross-border cyber investigations

The decision strengthens the government’s ability to defeat suppression-hearing requests in cases involving foreign-provided digital identifiers (e.g., Tor-related IP discovery), unless the defendant can plead concrete facts tying the FBI to operational execution or control. Defendants may find it difficult to meet this standard when the operational details are classified, abroad, or solely within government knowledge—an issue the dissent highlights as a “catch-22.”

(b) Preservation becomes outcome-determinative for emerging Fourth Amendment questions

By resolving the “foreign search on U.S. soil” claim on plain-error grounds, the opinion signals that novel constitutional theories about extraterritorial or cross-border searches must be raised early and explicitly, or appellate courts will likely decline to reach them.

(c) Sentencing practice

The opinion reinforces that even extensive mitigation—decorated military service and severe PTSD testimony—may not move the needle where the district court reasonably emphasizes offense severity, leadership/organizational role, protection of the public, and general deterrence, and the sentence remains within the guidelines.

4. Complex Concepts Simplified

  • Tor / Dark web: Tor is software that routes internet traffic through multiple relays to conceal a user’s real IP address. Dark-web sites often require Tor and are not reachable by standard browsers.
  • IP address: A numeric identifier that can often be linked (through an internet service provider) to a subscriber/location.
  • “Offensive code” / “offensive technical operations”: investigative code deployed to a target device so it “phones home” to a law-enforcement server and reveals identifying information (here, an IP address).
  • Exclusionary rule: a doctrine that can require suppression of evidence obtained in violation of the Fourth Amendment.
  • “Silver platter” doctrine: evidence handed to U.S. authorities by others may be admissible unless U.S. officers effectively “had a hand” in the search.
  • Joint venture: a foreign search may be treated like a U.S. search if U.S. agents substantially participated or the foreign officers acted as U.S. agents.
  • Plain error: a very high bar on appeal for arguments not raised below; typically requires that the legal rule be already clear from controlling precedent.
  • Within-guidelines sentence: a sentence that falls within the advisory federal Sentencing Guidelines range; it is not automatically upheld, but is often treated as a strong indicator of reasonableness on appeal.

5. Conclusion

United States v. William Michael Spearman establishes (or, at minimum, sharply clarifies) a practical rule in the Eleventh Circuit: to obtain a suppression hearing based on the “joint venture” exception to the general admissibility of foreign-obtained evidence, a defendant must plead specific, nonconjectural facts showing U.S. control or substantial participation—general cooperation, information sharing, or technology sharing will not do. The opinion also underscores the power of issue preservation: novel theories about foreign searches occurring on U.S. soil will not succeed on appeal under plain-error review absent controlling precedent. On sentencing, the case reiterates deferential review of § 3553(a) balancing and affirms that even extraordinary mitigation may be outweighed by extraordinary offense seriousness, especially when the guidelines call for life.