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What Is a Federal Cooperation Agreement?
The Conditional Promise
A federal cooperation agreement is, if one is being precise about the instrument, not an agreement in the sense that most people understand that word. It is a conditional promise from the government, revocable at the government’s discretion, in exchange for the most complete form of self-exposure the federal criminal justice system permits. The defendant agrees to tell the truth about everything, and the government agrees to consider whether that truth was useful.
The Supreme Court recognized in Santobello v. New York that promises made during plea negotiations carry binding force. But cooperation agreements occupy a different space than ordinary plea bargains. The government’s promise is not to recommend a particular sentence. The promise is to evaluate whether the defendant’s assistance rises to the level of “substantial,” a word the Sentencing Guidelines do not define with any precision. The evaluation belongs to the prosecutor alone. The court cannot compel it. Defense counsel cannot file the motion on the defendant’s behalf. The structure of the arrangement becomes clear at that point.
Most of the articles on this subject describe cooperation agreements as a “tool” or a “strategy.” The clinical language obscures what the instrument requires. A cooperation agreement requires a person to sit in a room with federal agents, without the protections that attend a courtroom, and provide information that will be used to prosecute people the defendant may know, may depend on, and may fear. The decision to cooperate is not a legal strategy in the way that filing a motion is a strategy.
The Proffer Session
The process ordinarily begins with what practitioners refer to as a proffer, sometimes called a “Queen for a Day” agreement. The name carries an irony that has not diminished with use.
A proffer letter is a written agreement between the defendant and the United States Attorney’s Office. Under its terms, the defendant agrees to answer questions truthfully at an interview conducted at the prosecutor’s office, attended by the defendant’s counsel, the assigned Assistant United States Attorney, and the investigating agents. The government agrees not to use the defendant’s statements in its case in chief at trial.
That protection is narrower than it appears.
The phrase “case in chief” is a term of art. It refers to the prosecution’s direct presentation of evidence before the defense puts on its case. It does not cover rebuttal. It does not cover impeachment. And it does not prevent the government from using what the defendant disclosed to develop new leads, locate new witnesses, or construct new charges based on information obtained through channels the proffer opened. This is what practitioners call derivative use, and it is the mechanism through which a proffer designed to assist the defendant can become the basis for a stronger case against them.
In the Second Circuit, courts have interpreted proffer agreements as permitting the government to use proffer statements for impeachment if the defendant later takes a position inconsistent with those statements, even through counsel’s arguments at trial. The practical consequence is severe. A defendant who proffers and then proceeds to trial may discover that their attorney cannot mount certain defenses, cannot cross examine certain witnesses, cannot place the defendant on the stand, because doing so would open the door to the very statements the proffer was supposed to protect.
We approach proffer sessions with a degree of caution that some clients initially find excessive. Before any meeting with the government, we conduct what amounts to a private debriefing: not to rehearse testimony (which would be improper) but to identify areas where the client’s memory is uncertain, where the facts may be more complicated than the client perceives them to be, and where truthful answers may carry consequences the client has not considered. The reason for this is not complicated. A proffer session is not a negotiation. It is an examination. The agents in the room already possess information the defendant does not know they possess, and the questions are constructed to test consistency rather than to gather impressions. A client who enters a proffer with an incomplete understanding of their own exposure will make statements that, however truthful, may be incomplete in ways the government treats as evasion.
Whether the government distinguishes between a genuinely incomplete memory and a strategic omission is a question I find difficult to answer with confidence.
Derivative Use and Its Consequences
The distinction between direct use and derivative use is the feature of cooperation agreements that receives the least attention in most discussions of the subject. It is, in practice, the feature that determines whether a proffer helps or harms the defendant.
Direct use is the simpler concept. The government cannot call an agent to the stand during its case in chief and have that agent recite what the defendant said during the proffer. That is the protection the agreement provides. Derivative use is everything the agreement does not prohibit. If the defendant mentions a meeting that took place on a particular date, the government may subpoena records from that date. If the defendant identifies a person involved in the alleged offense, the government may approach that person as an independent witness. If the government develops evidence through these channels, that evidence is admissible.
The standard federal proffer agreement does not restrict derivative use. Our practice is to raise the question of derivative use restrictions in preliminary conversations with the assigned AUSA (not because we expect to obtain a blanket prohibition, as in something close to a decade of this practice I cannot recall a single district in which the government agreed to one, but because the conversation itself reveals the government’s posture toward the potential cooperation and, more specifically, whether the office regards the defendant’s information as something it needs or something it merely finds convenient). A prosecutor willing to discuss the scope of derivative use, even without conceding a limitation, is communicating something about how the office values the case. A prosecutor who declines to discuss it is communicating something different.
In 2016, in the Southern District of New York, a cooperator in SEC v. Conradt was found to have breached his cooperation agreement by diluting his prior testimony. The court replaced a disgorgement figure that had been set at $2,500 with one approaching $980,000. Breach, in this context, can mean providing false information, but it can also mean failing to provide complete information. The distance between those two figures is a measure of what breach means in practice.
Sentencing Under Section 5K1.1
Under the federal Sentencing Guidelines, a defendant who has provided substantial assistance in the investigation or prosecution of another person may receive a sentence below the otherwise applicable guideline range. The mechanism is Section 5K1.1, which authorizes the court to depart downward upon motion of the government. The word “upon” carries the weight of the entire provision. Only the government can file a 5K1.1 motion. The defendant cannot. Defense counsel cannot. The court cannot grant a departure without it.
This is where the asymmetry of the cooperation agreement becomes most apparent. A defendant can cooperate in every way the agreement contemplates: provide truthful testimony, submit to repeated debriefing sessions, testify before a grand jury, accept the personal consequences that accompany visible cooperation. The government can then determine that the assistance, while truthful, did not constitute “substantial” assistance within the meaning of the Guidelines. No motion is filed. The defendant receives no sentencing credit. The cooperation, along with every risk the defendant assumed, produces nothing.
The Guidelines identify five factors the court should consider when determining the extent of a departure: the significance of the defendant’s assistance; the truthfulness and completeness of the information; the nature and extent of the assistance; any injury or risk of injury to the defendant or the defendant’s family; and the timeliness of the cooperation. But the court’s discretion remains broad, and the outcomes vary. A defendant’s cooperation in one district may produce a departure measured in years. Similar cooperation, before a different judge, may produce a departure of months. There is no formula.
For defendants facing mandatory minimum sentences, the 5K1.1 motion alone does not authorize the court to sentence below the statutory floor. A separate motion under 18 U.S.C. § 3553(e) is required for that authority. In practice, when the government files a 5K1.1 motion, it typically files the § 3553(e) motion as well. Typically is not the same as always. We have observed cases in which the government filed the guidelines departure motion but declined to file the motion under § 3553(e), leaving the defendant with a sentencing floor that the cooperation could not penetrate.
After sentencing, a defendant who provides additional substantial assistance may receive a further reduction under Federal Rule of Criminal Procedure 35(b). The motion must come from the government. The court’s authority to reduce the sentence depends on whether the government chooses to ask.
What the Agreement Cannot Promise
Courts interpret cooperation agreements according to contract principles. But it is a contract negotiated between parties whose positions bear no resemblance to equality, executed under conditions where one party faces imprisonment and the other holds the sole authority to determine whether the contract’s central condition has been satisfied.
The agreement will not guarantee a specific sentence. It will not guarantee that the government will file a 5K1.1 motion. What it will guarantee is that the defendant has pleaded guilty and, under most cooperation agreements, has waived the right to withdraw that plea even if the government rescinds the agreement. I am less certain about the enforceability of these waiver provisions than the text of the agreements would suggest, though in practice the question seldom reaches the court in a posture favorable to the defendant. A defendant whose cooperation is deemed insufficient has pleaded guilty with no corresponding benefit. The plea remains, the waiver remains, and the exposure has increased.
There is the matter of personal safety. The Sentencing Guidelines recognize risk to the defendant and the defendant’s family as a factor in determining the extent of a departure. The cooperation agreement itself does not address it. It does not promise relocation. It does not promise anonymity. The defendant’s name appears in filings. Testimony appears in transcripts. The fact of cooperation, once established, does not reverse.
The first letter from a former associate arrives, when it arrives, without announcement.
The decision to cooperate with the federal government is not a question that admits of a general answer. It depends on the strength of the evidence, the nature of the defendant’s involvement, the value of the information the defendant can provide, and the defendant’s own assessment of the risks that cooperation carries. A consultation is where that assessment begins. The call carries no obligation and assumes no outcome. It is the beginning of a conversation about what the government is offering, what the agreement permits, and what it does not.