Federal Conspiracy Charges Defense

A federal conspiracy conviction does not require that you committed a crime. It requires that you agreed to one. Under 18 U.S.C. 371, the government must establish three things: that two or more persons formed an agreement to commit a federal offense or to defraud the United States, that the defendant joined that agreement with knowledge of its purpose, and that at least one conspirator performed an overt act in furtherance of the objective. The overt act itself need not be criminal. A phone call will do. A wire transfer. A meeting at a restaurant in which nothing illegal occurred but in which, the government will later argue, the terms were understood.

This is the statute that prosecutors reach for first. Judge Learned Hand called it “that darling of the modern prosecutor’s nursery” in 1925. A century later, the characterization has only grown more precise.

The Overt Act Is Not What You Think It Is

There is a common misapprehension that the overt act requirement provides meaningful protection. It does not. The act need not constitute a crime, need not be an element of the target offense, need not even appear suspicious in isolation. A single act by any one conspirator satisfies the requirement for all of them. The Third Circuit’s model jury instructions state the principle with admirable clarity: the overt act need only be “a step toward carrying out the agreement.”

One step. By anyone.

In fiscal year 2024, the United States Sentencing Commission received documentation on 61,678 federal felony and Class A misdemeanor cases. Conspiracy was among the most frequently charged offenses across every category of federal crime. Drug conspiracy cases alone, brought under 21 U.S.C. 846, accounted for a substantial portion of the 18,150 drug cases that constituted nearly 30 percent of the entire federal criminal docket. Of those drug cases, 54.6 percent carried mandatory minimum penalties.

The numbers describe a system in which conspiracy is not an ancillary charge. It is the primary instrument of federal prosecution.

Two Statutes, Two Architectures

Section 371 contains two distinct prongs. The first prohibits conspiracy to commit any offense against the United States. The second prohibits conspiracy to defraud the United States. The distinction matters because the defraud clause does not require an underlying federal criminal offense at all. It reaches any agreement to impair, obstruct, or defeat the lawful function of any department of the government by dishonest means.

The defraud clause is broader than it appears. And it appears broad.

The penalty under Section 371 is imprisonment of not more than five years, unless the object of the conspiracy is a misdemeanor, in which case the conspiracy penalty cannot exceed the maximum for that misdemeanor. But this cap is misleading. Drug conspiracy under 21 U.S.C. 846 carries the same penalties as the underlying trafficking offense, which can mean ten years, twenty years, or life.

A person charged with conspiracy to distribute 500 grams of cocaine faces the same mandatory minimum as the person who held the cocaine. The statute makes no distinction between the planner and the carrier, between the architect and the courier, between the person who conceived the operation in February and the person who answered a telephone in March.

What Pinkerton Requires You to Accept

In 1946, the Supreme Court decided Pinkerton v. United States and established a rule that has governed federal conspiracy law for nearly eight decades. Under Pinkerton, a conspirator is liable for all substantive crimes committed by co-conspirators in furtherance of the conspiracy, provided those crimes were reasonably foreseeable as a natural consequence of the agreement.

The doctrine means that a defendant who agreed to participate in a fraud scheme can be convicted of wire fraud committed by a co-conspirator the defendant never met, on a date the defendant cannot recall, in a manner the defendant did not authorize, in a jurisdiction the defendant has never visited. The agreement is the predicate. Everything that follows from it attaches to everyone who entered it.

Sam Bankman-Fried received a sentence of 25 years in federal prison. His conviction included conspiracy to commit wire fraud, conspiracy to commit money laundering, and conspiracy to commit bank fraud. The case illustrated how conspiracy charges permit the government to aggregate the conduct of an entire organization and assign its full weight to the person at the center. But the doctrine applies with equal force to persons at the periphery. That is what makes it dangerous.

Is there a principle that distinguishes the architect from the person who merely stood in the room? There is. But it operates at sentencing, not at the verdict.

Mere Presence Is Not Agreement

In September 2024, the Tenth Circuit reversed a federal conspiracy conviction on the ground that the government had relied on unreasonable inferences drawn from the defendant’s physical location. The defendant was a passenger in a vehicle used to transport a large quantity of drugs. The government argued that her presence in the car, combined with the quantity of narcotics, was sufficient to establish the requisite intent and knowledge. The Tenth Circuit disagreed. Presence in a vehicle, even a vehicle containing contraband, does not establish that the passenger agreed to join a conspiracy to distribute.

The decision reaffirmed a principle that is stated often and honored less often: knowledge, without more, is insufficient. Silent acquiescence is not agreement. Proximity to criminal conduct is not participation in criminal conduct. The government must produce evidence that the defendant made a conscious decision to join the agreement, not merely that the defendant was aware of it.

This is the seam in the government’s case. In our experience, it is the seam that yields most frequently to sustained pressure at trial.

Withdrawal Exists, but the Burden Is Yours

The withdrawal defense is available to a conspiracy defendant, and it is almost uniquely difficult to establish. In Smith v. United States (2013), the Supreme Court held that the burden of proving withdrawal rests on the defendant by a preponderance of the evidence. This allocation is unusual in federal criminal law, where the prosecution carries the burden on nearly every other element.

To withdraw, a defendant must take an affirmative act inconsistent with the object of the conspiracy. Mere cessation is not withdrawal. Silence is not withdrawal. Moving to another city, abandoning contact with co-conspirators, living a clean life for years; none of this constitutes withdrawal in the legal sense. The defendant must communicate the withdrawal to co-conspirators in a manner reasonably calculated to reach them, or must take steps to report the conspiracy to law enforcement.

In United States v. Romero (2024), the Ninth Circuit rejected a withdrawal defense precisely because the defendant had never taken an affirmative act inconsistent with the conspiracy. The defendant had stopped participating. That was not enough.

One can understand the logic. One can still find the result severe.

The Co-Conspirator Hearsay Exception Opens the Door

Federal Rule of Evidence 801(d)(2)(E) permits the admission of statements made by a co-conspirator during the course and in furtherance of the conspiracy. The rule creates an exception to the hearsay prohibition that is, in practice, the single most powerful evidentiary tool available to prosecutors in conspiracy cases. Statements that would otherwise be inadmissible, recorded phone calls between persons the defendant has never spoken to, text messages the defendant has never seen, conversations in rooms the defendant has never entered, become admissible against the defendant because they were made “during the course and in furtherance” of the conspiracy.

The judge makes a preliminary finding under Rule 104(a) that a conspiracy existed and that the declarant and the defendant were members of it. Once that threshold is met, the statements come in. The jury hears words spoken by strangers and is instructed that those words may be considered as evidence against the defendant.

Justice Jackson warned about this in his concurrence in Krulewitch v. United States in 1949. He observed that the conspiracy doctrine, combined with the co-conspirator hearsay exception, permitted the government to bootstrap its way to conviction using evidence that bore no direct connection to the defendant’s own conduct. Seventy-seven years later, the mechanism remains undisturbed.

DEFENSE TEAM SPOTLIGHT

Todd Spodek

Lead Attorney & Founder

Featured on Netflix's "Inventing Anna," Todd Spodek brings decades of high-stakes criminal defense experience. His aggressive approach has secured dismissals and acquittals in cases others deemed unwinnable.

NY Bar Admitted Multi-State Licensed Federal Courts

Meet the Full Team

The Government’s Case Is a Narrative

Conspiracy prosecutions are constructed from the testimony of cooperating witnesses. This is structural, not incidental. The cooperator describes the agreement, identifies the participants, assigns roles, and provides the chronology that transforms a collection of ambiguous events into a criminal scheme. In exchange, the cooperator receives a reduced sentence. The reduction is proportional, the government will later tell the sentencing judge, to the value of the cooperation provided.

Consider what that incentive produces. The cooperator knows that his sentence depends on the number and significance of the persons he identifies. He knows that the government values corroboration but that, in a conspiracy case, the primary source of corroboration is often another cooperator operating under the same incentive. The architecture is circular. And it has produced convictions in cases where the defendant’s own conduct, examined in isolation, would not sustain any charge at all.

The effective defense in a conspiracy case is not the grand constitutional motion. It is the painstaking examination of the cooperator’s account: the inconsistencies in dates, the contradictions between proffer sessions, the moments where the timeline bends to accommodate the government’s theory rather than reflect what occurred. Each fracture in the narrative is a point of reasonable doubt. Enough fractures, and the structure collapses.

What a Defense Requires Before Trial Begins

By the time a conspiracy case reaches trial, its outcome has often been determined by what occurred in the preceding months. The pre-trial period is where the defense identifies the scope of the conspiracy the government intends to prove, challenges the admissibility of co-conspirator statements, files motions to sever defendants whose interests conflict, and examines whether the government can establish the overt act that the statute demands.

Severance is a consideration that defendants and their counsel too often neglect. In a multi-defendant conspiracy trial, the jury hears evidence against all defendants simultaneously. Evidence that is admissible against one defendant and devastating to another is heard by the same twelve people. A limiting instruction is the court’s remedy. It is not an adequate one.

The Southern District of New York sentenced 1,048 individuals in fiscal year 2024, with an average sentence of 59 months. That figure, nearly five years, reflects the seriousness with which the jurisdiction treats conspiracy cases. It also reflects the difficulty of mounting a successful defense in the district where many of the government’s most experienced prosecutors operate.

Early intervention alters the trajectory. Before indictment, during the target letter phase, during the period when the government is constructing its narrative and securing its cooperators, the defense has the opportunity to influence what the government believes it can prove. That window is not permanent.

The consultation is a diagnosis, not a commitment. It identifies the exposure, maps the statute to the facts as they exist, and determines whether intervention at this stage can prevent what becomes far more difficult to undo at trial.