Mid-Conspiracy Relationship Evidence Is “Intrinsic,” Not Rule 404(b) Other-Acts Evidence

Introduction

In United States v. Ricardo Davalos Martinez (6th Cir. May 26, 2026) (unpublished), the Sixth Circuit affirmed Ricardo Martinez’s jury convictions for (1) drug-trafficking conspiracy, (2) money-laundering conspiracy, and (3) using a communication facility to facilitate a drug offense. The prosecution’s theory was that Humberto Morales—already incarcerated—ran a multi-state narcotics network from prison, and that Martinez, a longtime friend, served as a trusted assistant who helped move drugs, track participants, and send money to suppliers.

On appeal, Martinez raised three principal issues: (i) sufficiency of the evidence on all counts, (ii) an alleged “variance” between the single conspiracy charged and proof at trial, and (iii) whether testimony that Martinez hired a private investigator to locate a prior witness against Morales was barred by Federal Rule of Evidence 404(b). The court rejected each argument.

Summary of the Opinion

• Sufficiency: Applying the deferential standard of Jackson v. Virginia, the court held that ample evidence showed Martinez knowingly joined the drug conspiracy, knowingly joined the money-laundering conspiracy, and knowingly used a cellphone to facilitate drug trafficking.
• Variance: No reversible variance occurred because the evidence supported a single, Morales-led conspiracy; and in any event, Martinez could not show prejudice, particularly under plain-error review.
• Intrinsic evidence: The private-investigator evidence was intrinsic to the charged conspiracy because it occurred during the conspiracy and illuminated the relationship between co-conspirators; Rule 404(b) therefore did not apply.

Analysis

Precedents Cited

1) Sufficiency of the evidence

The court grounded its review in Jackson v. Virginia, which asks whether “any rational trier of fact” could find guilt beyond a reasonable doubt, viewing the evidence favorably to the government. It paired that framework with the Sixth Circuit’s formulation in United States v. Getachew, emphasizing that appellate review does not reweigh evidence or reassess credibility.

For the drug conspiracy elements, the panel relied on the Sixth Circuit’s modern conspiracy articulation in United States v. Mosley (agreement plus knowing, voluntary entry), and the proposition in United States v. Wheat that the agreement need not be express and may be inferred. It reinforced the “linking evidence need not be extensive” principle via United States v. Sadler, which lowers the marginal proof needed once the broader conspiracy is shown.

For money laundering conspiracy, the court used United States v. Matthews both for the conspiracy framework and for the substantive money laundering elements (transaction involving unlawful proceeds, knowledge of unlawful proceeds, and intent to promote or to conceal/disguise).

For the communication-facility count, the panel quoted United States v. Dotson for the three elements (knowing use of a communication facility to facilitate a drug offense) and cited United States v. Wheat to confirm that a cellphone qualifies as a “communication facility.”

Addressing Martinez’s claim that he lacked knowledge of the conspiracy’s objective, the court acknowledged the limiting principle in United States v. Smith and United States v. Patel: absent knowledge of the common goal, a defendant cannot knowingly join. The panel distinguished those cases on the facts, holding that the record supported an inference of knowledge (and later, direct notice via messages offering drug sales).

2) Variance and multiple conspiracies

The court framed variance doctrine using United States v. Williams (2010) (variance “often raised but seldom seen” and reversible only if proof shows multiple conspiracies where one was charged, plus prejudice). It applied the definition from United States v. Guerrero (trial proof materially different from the indictment’s allegations, without changing the indictment’s terms).

Because Martinez did not preserve the variance issue, the panel applied plain-error review under United States v. Caver. It then cited United States v. Williams (2021) to underscore that, where evidence supports a single conspiracy, the claim fails—especially under plain-error standards.

To rebut Martinez’s “small separate conspiracies” theory, the court invoked United States v. Warner: a single conspiracy does not become multiple merely because participants lack full knowledge of all activities. Finally, even assuming multiple conspiracies, the court relied on United States v. Robinson for the prejudice principle: if the government proves multiple conspiracies and the defendant’s involvement in at least one, there is no variance affecting substantial rights.

3) Intrinsic evidence and Rule 404(b)

On the evidentiary issue, the panel used United States v. Simpson for two key propositions: (i) abuse of discretion is the standard of review, and (ii) Rule 404(b) “does not apply” to evidence intrinsic to the charged crime. It then relied on United States v. Pierce for the principle that evidence establishing how conspirators are related can be intrinsic, and on Simpson again for the idea that events occurring “in the middle of the charged conspiracy” are quintessentially intrinsic.

Legal Reasoning

Sufficiency

The opinion’s sufficiency analysis is cumulative and role-based: Martinez was not a peripheral acquaintance but a multi-function “right hand.” The court treated the following as probative of knowing participation: (1) tailing a courier transporting a large quantity of methamphetamine and relaying operational updates by text; (2) participating in wire transfers and cash drop-offs consistent with supplier payments; (3) maintaining records with members’ biographical/contact information; and (4) obtaining phones for the incarcerated leader to sustain the enterprise.

Importantly, the court rejected Martinez’s attempt to isolate individual acts as ambiguous. It emphasized context and inference—e.g., that being paid to run a “tail car” for a prison-run operation supports an inference of knowledge even without an explicit drug conversation—and then noted that subsequent messages directly tied Morales’s requests to drugs (methamphetamine and fentanyl), mooting any claimed initial ignorance for later conduct.

Variance

The panel’s single-conspiracy conclusion turned on organizational structure: multiple witnesses described Morales as the central decisionmaker, and Martinez operated under that unified command-and-control arrangement. Under Sixth Circuit law, centralized leadership and coordinated objectives commonly support a finding of one overall conspiracy even if participants’ awareness is compartmentalized.

The prejudice analysis was additionally dispositive: even if one could slice the evidence into multiple conspiracies, Martinez’s own conduct placed him in at least one of them, defeating relief under Robinson, and doing so under the demanding plain-error lens of Caver.

Intrinsic evidence

The court treated the private-investigator episode not as propensity evidence (“he did a bad act before, so he’s guilty”) but as narrative-and-relationship evidence integral to the conspiracy’s story. Two features mattered: (1) timing (it happened during the charged conspiracy) and (2) purpose (it illuminated Martinez’s closeness to Morales, directly countering Martinez’s trial theme that he did not know Morales well and disengaged once he learned of wrongdoing). On that framing, the evidence fell outside Rule 404(b) altogether as “intrinsic.”

Impact

• Conspiracy proofs remain highly inference-driven: The decision reinforces that juries may infer knowledge and agreement from coordinated acts (tailing, payments, recordkeeping, communications support), particularly when tied to a leader’s directions.
• Variance claims face steep odds—especially unpreserved: The opinion underscores how difficult it is to show (i) that the evidence “can reasonably be construed only” as multiple conspiracies and (ii) prejudice, and that plain-error review makes reversal rarer still.
• Broad “intrinsic evidence” pathway for relationship proof: The ruling supports admission of mid-conspiracy acts that explain trust, roles, and relationships, even when the acts themselves feel like “other misconduct,” so long as they are used to complete the story of the charged conspiracy rather than to argue propensity.

Complex Concepts Simplified

Drug-trafficking conspiracy (21 U.S.C. § 846)

An agreement—often proved by circumstantial evidence—to violate drug laws, plus the defendant’s knowing and voluntary participation. The government need not show a written or explicit agreement.

Money-laundering conspiracy (18 U.S.C. § 1956(h))

An agreement to launder money, plus knowing participation. Laundering generally means conducting financial transactions with criminal proceeds while either promoting the crime or hiding where the money came from or who controls it.

Using a communication facility (21 U.S.C. § 843(b))

Knowingly using a phone (or similar device) to help a drug crime happen—e.g., coordinating deliveries or evading detection.

Variance

A mismatch between what the indictment charged and what the trial evidence proved. In conspiracy cases, a classic variance claim is “you charged one conspiracy, but proved multiple.” Reversal also requires prejudice.

Plain error

A highly deferential appellate standard applied when the defendant failed to object in the trial court. The error must be clear and must affect substantial rights.

Rule 404(b) vs. intrinsic evidence

Rule 404(b) restricts “other acts” evidence offered to show character/propensity. But if the evidence is intrinsic—part of the charged conduct’s narrative (including relationship context during a conspiracy)—Rule 404(b) does not apply in the first place.

Conclusion

The Sixth Circuit’s decision in United States v. Ricardo Davalos Martinez affirms three core points. First, conspiracy convictions can rest on coordinated operational conduct that permits strong inferences of knowledge and agreement. Second, single-versus-multiple conspiracy variance arguments rarely succeed, and are especially unlikely to warrant reversal absent a preserved objection and a concrete showing of prejudice. Third, and most notably, evidence of mid-conspiracy acts that illuminate co-conspirators’ relationship and trust may be treated as “intrinsic,” placing it outside Rule 404(b)’s other-acts limitations when offered to explain the conspiracy’s workings rather than to prove propensity.