Federal Criminal Defense

What Is a Federal Proffer Session — And Should You Agree to One?

Reviewed by Deandra M. Grant, ACS-CHAL · SFST Instructor

Updated March 18, 2026

Read time 4 min

The Short Answer

If you are the target or subject of a federal investigation, there will likely come a point when the government invites you to participate in a proffer session which is sometimes called a “queen for a day.” The offer sounds appealing: come in, tell your side of the story, and maybe the government will go easier on you. But a proffer session is one of the most consequential decisions in a federal case, and the risks are enormous if you go in without experienced counsel or without a clear strategic purpose.

What Is a Federal Proffer Session — And Should You Agree to One?

At Deandra Grant Law, Attorney James Lee Bright has guided clients through proffer sessions over his 25+ year federal practice. Lee understands when a proffer serves the client’s interests, when it does not, and how to prepare a client to navigate the process effectively.

What a Proffer Session Actually Is

A proffer session is a meeting between the defendant (and their attorney), the Assistant United States Attorney, and federal agents. Before the session begins, the parties sign a proffer agreement (also called a proffer letter or “queen for a day” letter) that establishes the ground rules.

The proffer agreement typically provides that the government will not use the defendant’s statements during the session directly against the defendant in its case-in-chief at trial. However, and this is the critical caveat, the government can use the statements:

To obtain other evidence derived from the statements (leads)
To cross-examine the defendant if they testify at trial inconsistently with their proffer statements
To rebut any evidence or argument by the defense that is inconsistent with the proffer
In sentencing proceedings
In a prosecution for perjury or false statements if the defendant lies during the proffer

In practice, these exceptions are so broad that proffer statements can be used against the defendant in numerous ways. A proffer is not a free pass to tell your story without consequences.

When a Proffer May Serve Your Interests

When cooperation is the right strategic choice. If the evidence against you is overwhelming and your sentencing exposure is severe, cooperation through a proffer can be the first step toward a substantial assistance motion (§5K1.1) that allows the judge to sentence below mandatory minimums.
When you have genuinely exculpatory information. In some cases, the proffer is an opportunity to present facts that the government does not have — facts that change the government’s assessment of your culpability.
When the pre-indictment window is still open. A proffer during the investigation phase may influence whether charges are filed at all or may result in reduced charges.

When a Proffer Is Dangerous

When you do not fully understand the scope of the investigation. Without knowing exactly what the government knows, you cannot evaluate what your statements might reveal or contradict.
When you are not prepared to be completely truthful. Any false statement during a proffer is a federal crime (18 U.S.C. §1001) and will immediately destroy any possibility of cooperation benefit.
When the government is fishing for information. Sometimes the proffer invitation is the government’s way of filling gaps in its own case — using your statements to build a stronger case against you.
When cooperation is not in your strategic interest. If the evidence against you is weak, if you intend to go to trial, or if cooperation would expose you to retaliation, a proffer may do more harm than good.

How Lee Bright Prepares Clients for Proffer Sessions

Lee’s preparation for a proffer session is exhaustive. Before the session, Lee reviews all available discovery and evidence, conducts detailed interviews with the client to understand exactly what they will say, identifies areas where the client’s account may conflict with other evidence, prepares the client for the types of questions the AUSA will ask, establishes clear boundaries on what topics will and will not be discussed, and negotiates the terms of the proffer agreement itself.

During the session, Lee is present and active — protecting the client from questions that exceed the agreed scope, intervening when necessary, and ensuring that the client’s statements are accurate and strategic.

Contact Deandra Grant Law

If you are under investigation or have been charged with a federal offense, contact Deandra Grant Law for a free, confidential consultation with Attorney James Lee Bright. Lee has more than 25 years of federal trial experience and is admitted to practice in all four federal districts in Texas, the District of Columbia, the Fifth Circuit Court of Appeals, and the United States Supreme Court.

Key Terms

The words that come up most on this page, in plain English.

Proffer letter: The written agreement setting the terms of a proffer session — what the government may and may not do with your statements. Drafted by the prosecutor and negotiable at the margins.
Rule 410: Federal Rule of Evidence 410, which generally makes statements in plea discussions inadmissible. Proffer letters carve exceptions into it.
Kastigar immunity: Protection under 18 U.S.C. § 6002 barring both direct and derivative use of compelled testimony. Substantially broader than a proffer letter.
U.S.S.G. § 1B1.8: The Guidelines provision preventing self-incriminating information disclosed under a cooperation agreement from being used to increase your own Guidelines range.
5K1.1 motion: A government motion permitting a sentence below the Guidelines range, and below a mandatory minimum, for substantial assistance. Discretionary and rarely reviewable.

Frequently Asked Questions

Is a proffer the same as immunity?

No. Immunity under 18 U.S.C. § 6002 is compelled by court order and bars both direct and derivative use of your testimony. A proffer letter is a limited agreement that keeps your statements out of the government's case-in-chief while preserving impeachment, rebuttal, and derivative use.

Can what I say in a proffer be used against me?

Yes, in several situations: to impeach you if you testify inconsistently, to rebut defense evidence or argument under most modern proffer letters, and without restriction at all if the government concludes you were untruthful. Leads developed from your statements are also generally fair game.

What is "queen for a day"?

Defense slang for a proffer session — the idea being that for one day you can speak freely. It overstates the protection considerably, which is why the term is best treated as a warning rather than a description.

Do I have to admit my own conduct?

Yes. A proffer requires complete truthfulness about your own role, not only about others. Partial or shaded accounts are the most common way proffers collapse, because the government usually has documents that contradict them.

Can I refuse a proffer without hurting my case?

Declining a proffer is not an admission and cannot be used as evidence of guilt. It may mean forgoing a substantial-assistance reduction, which is a real cost — but it is a strategic cost, not a legal penalty.

Will the prosecutor definitely file a 5K1.1 motion if I cooperate?

No. The motion is discretionary and the government's decision is largely unreviewable by the court. A cooperation agreement typically commits the government only to consider filing, not to file. This is the central risk in any cooperation strategy.

Subscribe via RSSGet new DWI guides in your reader

Written & Reviewed By

Deandra M. Grant, J.D.

ACS-CHAL Forensic Lawyer-Scientist with an M.S. in Pharmaceutical Science and a Graduate Certificate in Forensic Toxicology. Author of The Texas DWI Manual, and a trained SFST instructor. Defending Texas DWI cases since 1994.

Full profile and credentials →