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Second Opinions on Federal Proffer Agreements: When to Get One
The proffer letter is not a gesture of goodwill. It is a contract, and like most contracts drafted by one party for the benefit of that party, its protections are distributed in a manner that favors the drafter. The government writes the proffer letter. The government controls its terms. In most districts, those terms have expanded over the past fifteen years in ways that defense counsel does not always register, particularly counsel whose federal practice is intermittent or whose exposure to proffer negotiations is limited to a handful of cases per year.
This is the reason a second opinion exists in this context. Not because the first attorney is incompetent. Because the document demands a reader who has seen its variations across districts, across prosecutors, across the particular sub-practices where the boilerplate differs in ways that matter. A client under federal investigation does not need permission to seek that second reading. What the client needs is a reason to recognize the moment when that second reading becomes necessary.
What the Kastigar Waiver Surrenders
The phrase “use immunity” creates an impression of protection. Your statements cannot be used against you. That is what the client hears, and it is, if we are being precise, not what the letter says.
Most proffer letters contain a Kastigar waiver. The name refers to Kastigar v. United States, a 1972 Supreme Court decision establishing that use and derivative use immunity is sufficient to compel testimony without violating the Fifth Amendment. The decision also held that if the government later prosecutes the immunized witness, it bears the burden of demonstrating its evidence derives from sources independent of the compelled testimony. The proffer letter removes that burden. The waiver eliminates the defendant’s right to a hearing at which the government would have to demonstrate that its evidence was not tainted by what the defendant disclosed.
What remains after the waiver is something less than what the word “immunity” suggests. The government agrees not to introduce your statements in its case in chief. It retains the right to pursue every investigative lead those statements generate. It retains the right to use your statements for impeachment if your trial testimony departs from what you said in the conference room. And in several circuits, the Second and Third among them, courts have upheld proffer provisions that permit the government to use your statements to rebut not only your testimony but any evidence or argument offered on your behalf, even if you never take the stand.
The Second Circuit’s decision in United States v. Velez endorsed this reading. The Third Circuit, in United States v. Hardwick, went further: a defendant who attempted to shift blame during trial triggered the waiver clause even though he did not testify. The government introduced his proffer statements through other witnesses. Whether this interpretation holds with equal consistency in every circuit is not something I can confirm from the cases I have reviewed, though the tendency has been to favor the government’s reading.
A proffer letter offers use immunity. It does not offer derivative use immunity. The distance between those two phrases contains most of the risk.
A client who hears “your words cannot be used against you” and signs the letter has consented to something different from what that sentence describes. Whether the first attorney explained the difference is, in most of the cases that arrive at this office for a second look, the question that matters.
When to Seek the Second Opinion
The answer is before the letter is signed. Not after the proffer session, when the statements have already been made and the derivative leads have already been generated.
There are specific circumstances that should trigger the consultation. The first is when the attorney recommending the proffer does not regularly practice in federal criminal defense. State practitioners, civil litigators handling a matter as a favor, attorneys whose federal experience is concentrated in areas other than criminal defense: all of them encounter proffer letters with less frequency than the document demands. The letter varies by district, by individual prosecutor, and by the type of investigation. An attorney who treats the letter as a standard form has already made an error that the client will not perceive until later.
The second circumstance is when the attorney cannot articulate, with specificity, what the government already knows. Before a proffer session, defense counsel must possess a working theory of the government’s evidence, its gaps, and the particular information it is seeking from the client. If the recommendation to proffer rests on a general sense that cooperation is advisable rather than a specific assessment of what the client can offer and what the government will do with it, the recommendation is not complete.
The third is when the client has been told the proffer is “standard” or “routine.” There is nothing standard about waiving your right to challenge derivative use of your own statements.
The Debt That Silence Accumulates
One does not typically arrive at the question of a second opinion through careful planning. The question arises when something feels wrong, and the client cannot identify what.
In a fraud case we reviewed (the review was the second opinion, not the original representation), the client had been told that cooperation was the only viable path. The evidence was strong, the attorney said. The guidelines range was severe. A proffer, followed by a cooperation agreement, followed by a Section 5K1.1 motion for substantial assistance, was the way to a sentence the client could survive. All of this may have been true. The problem was what the attorney had not assessed.
The client’s information was of marginal value to the government. The client occupied a peripheral role in the alleged conspiracy. The government’s interest in the proffer was less about what the client could offer and more about what the client might confirm: names, dates, the sequence of transfers. The proffer session, if it proceeded, would have served primarily as a means for the government to test its theory against a live witness who had waived most of his protections.
We recommended against the proffer.
The case resolved in a manner that was, though I am less certain about this than the preceding sentence might suggest, more favorable than the alternative. The counterfactual is always speculative in criminal defense. You do not know what would have happened had the proffer gone forward, because it did not go forward.
The point is not that the first attorney was wrong. The point is that the first attorney’s recommendation rested on an assumption about the government’s motives that a second pair of eyes could test. Criminal defense operates under conditions where the government knows more than you do. Your attorney knows more than you do. But your attorney may not perceive as much as the government does about what the government already possesses. A second attorney, one with experience in the same district or with the same prosecutor’s office, can sometimes identify the shape of the government’s case from details the first attorney did not weigh.
There is a particular kind of confidence that attaches to the first recommendation a client receives. The client is frightened. The attorney is certain. The combination produces compliance. A second opinion introduces friction into that process, and the friction is beneficial whether the second opinion confirms the first or contradicts it. The client’s decision is better for having been tested.
The Eleventh Circuit’s decision in United States v. Schwartz illustrates the cost of not testing. The defendant signed a proffer letter that waived his right to a Kastigar hearing. The court held that this waiver also foreclosed his ability to challenge the government’s use of his statements before the grand jury, even though the proffer letter did not explicitly address grand jury proceedings. Whether a second attorney would have caught that gap is a question worth considering.
The gap in the letter became the government’s advantage.
What the Second Attorney Should Examine
The proffer letter itself is the first object of review. Not the conversation about the proffer, not the client’s emotional state: the document.
A second attorney conducting this review should assess the following:
- Whether the letter includes a Kastigar waiver and how broadly it is drafted
- Whether the impeachment clause is limited to the defendant’s testimony or extends to evidence and arguments offered by the defense
- Whether the letter permits the government to use proffer statements at sentencing, in probation reports, or in rebuttal
- Whether the letter holds the client accountable for representations made by defense counsel during the session
That fourth provision is less common but not rare. Certain proffer letters in the Southern and Eastern Districts treat attorney representations made during the proffer as binding on the client. If the attorney characterizes the client’s role one way during the session and the client later assumes a different position at trial, the government may introduce the attorney’s prior statement. Robert Bonsib (who, it should be noted, produced one of the most detailed analyses of proffer letter provisions available in the defense literature) argued that such clauses should be struck from the agreement during negotiation. Not every attorney does.
Beyond the letter, the second attorney should assess the strategic question: does the proffer serve the client’s interests or the government’s. This requires an independent evaluation of the evidence, the client’s exposure under the Sentencing Guidelines, the value of the information the client possesses, and the realistic probability that cooperation will result in a Section 5K1.1 motion from the government. These are not questions that require privileged information from the first attorney. They require a fresh reading of the indictment, the discovery, and the letter.
The Attorney Proffer
Before any client enters a proffer session, there is an option that not all defense attorneys employ and that merits consideration during any second opinion: the attorney proffer.
In an attorney proffer, defense counsel meets with the prosecutor and presents, in hypothetical terms, what the client’s testimony would contain. The client is not present. No waiver is signed. The conversation operates in a space that experienced practitioners on both sides treat as preliminary negotiation. The attorney proffer serves a diagnostic function. It permits defense counsel to gauge the government’s level of interest in the client’s information without exposing the client to the risks of a formal session. If the prosecutor’s reaction suggests that the client’s information is of limited value, or that the government’s primary interest is confirmatory rather than investigative, the attorney proffer allows defense counsel to withdraw before the client has said a word under a waiver.
Whether the first attorney considered this option is a question the second attorney should pose. In something like forty percent of the second opinions we conduct on proffer matters, the attorney proffer was never raised with the client as a preliminary step.
Procedural Timing and the Pressure to Decide
A proffer letter does not arrive with a deadline printed on it. The deadline is implied. It lives in the prosecutor’s tone, in the suggestion that cooperation is most valuable when offered early and that it loses its currency as the investigation progresses. Some of this is true. The rest is pressure, and distinguishing between the two from the outside is difficult.
A second opinion requires time. That time exists even when the client believes it does not. In most federal investigations, the interval between the proffer letter’s arrival and the government’s actual need for the client’s information is measured in weeks, not hours. The urgency is manufactured to prevent the kind of reflection a second opinion provides.
I will say this plainly: if a prosecutor tells your attorney that there is no time for a second opinion, that statement is itself a reason to obtain one.
The proffer is not the only moment in federal criminal defense where a second opinion changes the calculus, but it is the moment where the consequences of proceeding without one are least reversible. A guilty plea can be withdrawn under certain circumstances. A trial strategy can be adjusted between proceedings. But a proffer session, once conducted, produces statements and leads that cannot be recalled. The information is in the government’s possession. The waiver is signed. What was said in the conference room on the seventh floor of the federal building exists now in the agent’s notes, in the prosecutor’s preparation binder, for the duration of the case.
The principle is the same one that applies to any procedure whose effects are permanent. You do not seek a second opinion because you distrust the first. You seek it because the decision, once made, does not reverse.
A consultation costs nothing and commits to nothing. It is a conversation between the client and an attorney who has no stake in the recommendation already made, whose only obligation is to the question on the table: whether this proffer, under these terms, with this information, against this government, is a decision the client should make. That is where the evaluation begins.