Overwhelming Evidence Renders Alleged “Overview” and Prejudicial-Background Testimony Harmless in Money-Laundering Conspiracy Trials

Case: United States v. Figueroa (1st Cir. Mar. 17, 2026) (Not for Publication)
Court: United States Court of Appeals for the First Circuit
Panel: Montecalvo, Thompson, and Aframe, Circuit Judges

1. Introduction

After a jury trial in the District of Massachusetts, Mark Anthony Figueroa was convicted of one count of money laundering conspiracy under 18 U.S.C. § 1956(h). The prosecution’s theory was that Figueroa participated in six large cash transfers (roughly $100,000 each) that witnesses linked to drug proceeds moved through a laundering network operated by cooperating witness Pedro Antonio Magana-Aladro (“Magana”).

On appeal, Figueroa focused not on the sufficiency of the evidence, but on evidentiary rulings. He argued the district court improperly admitted: (1) Magana’s testimony describing his kidnapping and beating by cartel members (allegedly irrelevant and unfairly prejudicial), and (2) testimony from three law enforcement-related witnesses that allegedly amounted to improper “overview” testimony and/or impermissible opinion on ultimate issues (e.g., repeatedly calling money “drug proceeds”).

The First Circuit affirmed, holding that—given the strength of the government’s corroborated evidence—any arguable evidentiary errors were harmless (and some arguments were waived or failed plain-error review).

2. Summary of the Opinion

The First Circuit rejected each evidentiary challenge and affirmed the conviction. In substance, the court held:

  • Even assuming Magana’s cartel-kidnapping testimony should not have been admitted, any error was harmless in light of overwhelming independent evidence linking Figueroa’s cash transfers to drug trafficking.
  • As to claimed improper “overview” testimony by DEA Agent O’Shaughnessy, the court accepted that parts were problematic (and the government conceded some error), but found no prejudice warranting reversal, emphasizing curative instructions and corroborative evidence (texts, recordings, surveillance).
  • An undercover agent’s repeated references to the cash as “drug proceeds” did not warrant reversal because any error was harmless in context.
  • The challenge to the auditor’s testimony was deemed waived for lack of developed argumentation.
  • The court found no “cumulative error” because the asserted issues did not synergistically undermine the verdict.

3. Analysis

3.1 Precedents Cited (and How They Shaped the Decision)

The opinion is a synthesis of well-established First Circuit doctrines—standards of review, the special risks of “overview” witnesses, and the centrality of harmlessness/prejudice. The cited cases function less as vehicles for new doctrine than as guardrails for evaluating alleged evidentiary missteps.

A. Standards of Review and Harmlessness

  • United States v. García-Sierra, 994 F.3d 17 (1st Cir. 2021): Cited for the baseline framework—preserved evidentiary errors are reviewed for abuse of discretion; unpreserved issues for plain error. The court also invoked García-Sierra’s concern that “overview” testimony can improperly bolster a later witness’s credibility, but concluded corroborated, self-proving communications diminished that risk here.
  • United States v. Villa-Guillen, 102 F.4th 508 (1st Cir. 2024) (quoting United States v. Burgos-Montes, 786 F.3d 92 (1st Cir. 2015)): Supplied the harmless error test—whether “the judgment was not substantially swayed by the error.” This phrase is the backbone of the court’s repeated conclusion that even arguable missteps did not move the verdict.
  • United States v. Feliciano-Candelario, 128 F.4th 5 (1st Cir. 2025) (quoting United States v. Cruz-Agosto, 102 F.4th 20 (1st Cir. 2024)): Provides the four-part plain-error test for unpreserved claims—error, clear/obvious, affects substantial rights, and seriously impairs the fairness/integrity of proceedings. The court relied on this structure to emphasize that even if some “overview” testimony was improper, prejudice was not shown.
  • United States v. Velazquez-Fontanez, 6 F.4th 205 (1st Cir. 2021): Reinforces that harmless evidentiary error does not require reversal—used to sidestep the debate about whether the kidnapping testimony was preserved because the court found any error harmless either way.
  • United States v. Rivera-Carrasquillo, 933 F.3d 33 (1st Cir. 2019): A Rule 403-style harmlessness analogy—admission of “gruesome” evidence can be harmless where other evidence is weighty. The court used this to reason that even emotionally charged cartel testimony did not control the outcome.
  • United States v. Flores-de-Jesus, 569 F.3d 8 (1st Cir. 2009): Cited for the “highly probable” formulation of harmlessness (error did not influence the verdict), supporting the conclusion that surveillance of the money drops and recordings eclipsed any disputed testimony.
  • United States v. Rodriguez-Adorno, 695 F.3d 32 (1st Cir. 2012) (quoting United States v. Rodriguez, 525 F.3d 85 (1st Cir. 2008)): Used to frame the “ultimate issue” discussion: even potentially prejudicial labeling (e.g., “drug proceeds”) can be harmless “in the context of all of the evidence offered at trial.”

B. “Overview Witness” Doctrine and Curative Instructions

  • United States v. Etienne, 772 F.3d 907 (1st Cir. 2014): The opinion’s primary definition and critique of “overview” testimony. Etienne lists three inherent problems: (1) facts/credibility not in evidence; (2) later evidence may diverge; (3) undue “imprimatur” of the government. The court measured O’Shaughnessy’s early testimony against these risks, but ultimately treated any violation as non-prejudicial.
  • United States v. Kuljko, 1 F.4th 87 (1st Cir. 2021): Supports the proposition that a “swift and strong curative instruction” can neutralize prejudice. The district court’s immediate “no guilt by association” instruction played an important role in the harmlessness analysis, particularly regarding agent testimony identifying alleged DTO members.

C. Waiver and Underdeveloped Appellate Arguments

  • United States v. Zannino, 895 F.2d 1 (1st Cir. 1990): Central to the disposition of two threads—(1) the court deemed certain arguments waived where Figueroa did not explain prejudice (e.g., alias “Maiky” testimony), and (2) the challenge to auditor George’s testimony was waived because it was argued “in a perfunctory manner” without developed reasoning.

D. Cumulative Error

  • United States v. Padilla-Galarza, 990 F.3d 60 (1st Cir. 2021): Supplies the “logarithmic effect” articulation of cumulative error. The court cited it to frame cumulative error as “rare,” then rejected the claim for lack of a persuasive account of compounding prejudice.
  • United States v. Rosario-Pérez, 957 F.3d 277 (1st Cir. 2020) (quoting Williams v. Drake, 146 F.3d 44 (1st Cir. 1998)): Provides the “critical mass” language—errors must synergistically cast a “shadow upon the integrity of the verdict.” The court held the record did not approach that threshold.

3.2 Legal Reasoning

A. Magana’s Kidnapping Testimony: Assumed Error, No Prejudice

The court did not definitively endorse the relevance of the kidnapping narrative; instead, it assumed arguendo that the testimony could have been irrelevant or unfairly sympathy-inducing and proceeded directly to harmlessness. The reasoning turned on two features of the trial record:

  • Relative proportion: the kidnapping account was a small slice of Magana’s testimony about the laundering mechanics.
  • Independent corroboration: the government’s case did not hinge on Magana’s emotional credibility. The panel stressed that communications (texts and recorded calls) and surveilled money drops “spoke for themselves,” and that the jury had extensive evidence of drug-related discussions (“white things,” “perico,” “I’m the factory,” “con todo, with everything”) independent of the kidnapping story.

In effect, the court treated the prejudice theory—sympathy leading to undue credibility—as too attenuated given the direct, non-hearsay, and surveillance-backed proof tying Figueroa to repeated high-cash transfers and drug-trafficking coded language.

B. O’Shaughnessy: Even Problematic “Roadmap” Testimony Didn’t Move the Verdict

The panel acknowledged the “overview witness” hazards from Etienne and accepted the government’s concession that some agent testimony (notably identifying individuals as DTO members and connecting them to Figueroa) should not have been admitted—especially where the trial did not later supply evidence about certain figures.

Still, the court found no reversible prejudice for three main reasons:

  • Curative instruction: the district court immediately warned the jury “there is no guilt by association” and to await evidence.
  • Corroborated key links: where the agent referenced Coboj-Acosta, the government also introduced WhatsApp messages between Coboj-Acosta and Figueroa discussing pills and pricing—more direct proof than an agent’s characterization.
  • Overwhelming surveillance/record evidence: the case was built around watched cash drops, bank deposits/wires, and recorded statements; thus, the agent’s narrative framing was unlikely to be decisive.

The court also used waiver principles (Zannino) to reject undeveloped prejudice claims about certain challenged snippets (e.g., alias testimony).

C. Hernandez: Calling Cash “Drug Proceeds” Was Not Outcome-Determinative

The court treated the repeated use of “drug proceeds” as potentially problematic “ultimate issue” labeling—particularly because the characterization goes to a core contested element (whether the funds were illicit proceeds). But the court held any error harmless in context because the jury also heard: (1) Magana’s explanation of laundering operations; (2) recordings of Figueroa describing drug dealing capacity (“I’m the factory”); and (3) additional evidence suggesting narcotics trafficking and distribution logistics.

D. George and Cumulative Error: Waiver and Lack of Compounding Prejudice

The court disposed of the challenge to auditor George’s testimony largely on waiver: the appellate argument was too thin to require a merits response. It then rejected cumulative error because Figueroa did not explain how the alleged mistakes compounded into a “critical mass,” and because the unchallenged evidence remained decisive.

3.3 Impact

Although labeled “Not for Publication,” the opinion offers practical guidance on how the First Circuit is likely to evaluate similar evidentiary claims:

  • Harmlessness will dominate where the record includes surveillance, recordings, and documentary corroboration. The court repeatedly emphasized that direct communications and observed transactions reduce the significance of potentially prejudicial narrative testimony.
  • “Overview witness” objections remain viable, but prejudice is the real battlefield. Even when the government concedes a misstep, a conviction will stand absent a convincing explanation of how the “roadmap” actually swayed the jury in a case with extensive independent proof.
  • Curative instructions matter. A prompt “no guilt by association” instruction can blunt the sting of identity/association testimony, especially when the prosecution later offers substantive evidence for key linkages.
  • Appellate waiver is a recurring trap. The opinion reinforces that undeveloped or prejudice-free assertions (especially about discrete evidentiary snippets) can be forfeited under Zannino.

4. Complex Concepts Simplified

  • Money laundering conspiracy (18 U.S.C. § 1956(h)): An agreement to commit money laundering; the government typically must prove an agreement and knowing participation, often tied to proceeds of specified unlawful activity (here, drug trafficking).
  • “Overview witness” testimony: When a government agent testifies early to provide a “roadmap” of the case. It’s risky because it may (a) suggest facts not yet proven, (b) implicitly vouch for later witnesses, or (c) give the jury the sense the government has already validated the story.
  • Ultimate issue testimony: Testimony that effectively answers the jury’s core question (e.g., labeling disputed money as “drug proceeds”). Some opinion testimony is allowed, but courts scrutinize statements that substitute a witness’s conclusion for the jury’s verdict.
  • Harmless error: Even if the judge made a mistake, the conviction stands if the mistake likely did not affect the verdict.
  • Plain error: A stricter review used when the defense did not properly object at trial; the defendant must show an obvious error that likely changed the outcome and seriously undermined the proceeding’s fairness.
  • Curative instruction: A judge’s direction to the jury intended to neutralize potential prejudice (here, that there is “no guilt by association”).
  • Cumulative error doctrine: Multiple small errors can sometimes combine to require reversal if, together, they undermine confidence in the verdict—though the First Circuit characterizes such cases as rare.
  • Waiver on appeal: If a party mentions an issue without meaningful argument or without explaining prejudice, the appellate court may treat it as abandoned.

5. Conclusion

United States v. Figueroa is a harmless-error-driven affirmance: the First Circuit assumed (and the government conceded) that portions of testimony—particularly early agent “overview” characterizations and emotionally charged cartel background—could be problematic, but held the conviction stable because the evidentiary record included extensive independent corroboration (surveillance of cash drops, bank deposit/wire trails, texts, recorded calls, and undercover recordings).

The case underscores a pragmatic appellate reality in the First Circuit: evidentiary errors, even when identifiable, rarely yield reversal unless the defendant can connect them to concrete prejudice in a record not otherwise dominated by direct, self-authenticating proof.