Brady Lists and Exculpatory Evidence: What the Government Must Disclose

By Elizabeth Franklin-Best, Esq., and Christopher Zoukis, JD, MBA

What is a Brady list?

A “Brady list” is a prosecutor’s internal record of law-enforcement witnesses with credibility problems that may have to be disclosed to the defense. Exculpatory evidence is any evidence favorable to the accused and material to guilt or punishment. There is no national federal Brady list — disclosure runs district by district under the Justice Manual’s Giglio policy.

Key takeaways on Brady lists and disclosure

• The constitutional rule is one sentence long. Brady v. Maryland, 373 U.S. 83, 87 (1963): “the suppression by the prosecution of evidence favorable to an accused upon request violates due process where the evidence is material either to guilt or to punishment, irrespective of the good faith or bad faith of the prosecution.”
• Impeachment evidence counts as favorable evidence. United States v. Bagley, 473 U.S. 667, 676 (1985): “[i]mpeachment evidence, however, as well as exculpatory evidence, falls within the Brady rule,” and the same materiality standard applies whether the defense made a specific request, a general request, or none.
• The prosecutor is responsible for what the investigators know. Kyles v. Whitley, 514 U.S. 419, 437 (1995): “the individual prosecutor has a duty to learn of any favorable evidence known to the others acting on the government’s behalf in the case, including the police.”
• There is no single national Brady list. Federal practice runs through Justice Manual §9-5.100, the “Giglio Policy,” which works by per-case request from a designated Requesting Official in the prosecuting office to a designated Agency Official at the investigative agency.
• DOJ policy requires more than the Constitution does. Justice Manual §9-5.001 “requires disclosure by prosecutors of information beyond that which is ‘material’ to guilt as articulated in Kyles v. Whitley.” It also states that it “does not create a general right of discovery” and does not “provide defendants with any additional rights or remedies.”
• Since 2020 a federal judge must order it out loud. Fed. R. Crim. P. 5(f) requires that “on the first scheduled court date when both prosecutor and defense counsel are present, the judge shall issue an oral and written order … that confirms the disclosure obligation of the prosecutor under Brady v. Maryland … and the possible consequences of violating such order.”

What is a Brady list?

A Brady list — often called a Giglio list, or a Brady–Giglio list — is a prosecutor’s internal record identifying law-enforcement officers and other government witnesses whose history contains information that may have to be turned over to the defense because it bears on their credibility.

The name comes from two Supreme Court cases stacked on top of each other. Brady v. Maryland established that the prosecution must disclose favorable, material evidence. Giglio v. United States extended that duty to evidence affecting a witness’s credibility. Put together, they mean that if a testifying officer has a documented history of dishonesty, that history is potentially disclosable evidence — because it is favorable to the defense and it may be material.

What lands an officer on such a list, in the federal system, is set out in the Justice Department’s own policy rather than left to guesswork. Justice Manual §9-5.100 lists the categories of potential impeachment information that investigative agencies must provide to prosecutors on request. Verbatim, they include:

“(i) any finding of misconduct that reflects upon the truthfulness or possible bias of the employee, including a finding of lack of candor during a criminal, civil, or administrative inquiry or proceeding; (ii) any past or pending criminal charge brought against the employee; (iii) any allegation of misconduct bearing upon truthfulness, bias, or integrity that is the subject of a pending investigation; (iv) prior findings by a judge that an agency employee has testified untruthfully, made a knowing false statement in writing, engaged in an unlawful search or seizure, illegally obtained a confession, or engaged in other misconduct; (v) any misconduct finding or pending misconduct allegation that either casts a substantial doubt upon the accuracy of any evidence … or that might have a significant bearing on the admissibility of prosecution evidence.”

That fifth category expressly reaches substantive violations concerning the collection and handling of evidence, the taking of statements, the recording of communications, and the obtaining of consents to search.

Two things follow that the general coverage tends to miss. Being flagged does not automatically end an officer’s career or bar him from testifying — the policy contemplates disclosure, and separately contemplates that a prosecuting office may decide “that an agency employee should not testify or serve as an affiant because of potential impeachment information.” Employment consequences are a matter for the employing agency, not for this policy. And not everything in the file gets disclosed: the categories describe what the agency must give the prosecutor, who then decides what the Constitution and Department policy require giving the defense.

Is there a national Brady list?

No. This is the single most common misconception about federal practice, and it matters because people search for a database that does not exist.

There is no federal Brady list, no national registry, and no searchable public database of flagged federal agents. What exists is a process, and the Justice Manual describes it in structural terms:

• Agency Officials. “Each of the investigative agencies shall designate an appropriate official(s) to serve as the point(s) of contact concerning Department of Justice employees’ potential impeachment information.” The policy covers the FBI, DEA, ATF, the U.S. Marshals Service, the DOJ Office of the Inspector General, and the DOJ Office of Professional Responsibility. A separate 1996-version policy issued by the Secretary of the Treasury “remains in effect for Treasury investigative agencies.”
• Requesting Officials. “Each of the Department of Justice prosecuting offices shall designate one or more senior official(s) to serve as the point(s) of contact concerning potential impeachment information.”
• A per-case request. “Upon initiation of a case or matter within the prosecuting office, or anytime thereafter, a prosecutor may request potential impeachment information relating to an agency employee associated with that case or matter.”

So the inquiry is triggered case by case, officer by officer, by a prosecutor who asks. It is not a standing list someone consults.

Prosecuting offices may maintain what the policy calls a “Giglio system of records,” but its scope is deliberately narrow. It exists for internal consistency — it retains, among other things, the impeachment information, the legal analysis of the disclosure decision, and any related pleadings or court orders, in cases where information was actually disclosed or where a decision was made that an employee should not testify. The policy then restricts access: Requesting Officials “shall ensure that the information in their office’s Giglio system of records is securely maintained and is accessible only upon a request to a Giglio Requesting Official or other senior management.” In many circumstances the complete description of the impeachment information “may be maintained in the criminal case file, but it may not be maintained in the Giglio system of records.”

And one line governs everything above: “This policy is not intended to create or confer any rights, privileges, or benefits to prospective or actual witnesses or defendants. It is also not intended to have the force of law.” The policy is not a source of rights you can enforce. Your rights come from the Constitution, from Rule 16, and from the Jencks Act. The policy is how the government organizes itself to comply, and knowing how it is organized is what makes an intelligent request possible.

The public “Brady lists” you read about in the news are almost always maintained by state district attorneys, county prosecutors, or state attorneys general and cover local police. They are governed by state law and state public-records statutes, and a challenge to a state conviction runs through 28 U.S.C. §2254 rather than §2255. If an officer from a state or local department worked on your federal case as part of a joint task force, whether that department’s list matters is a fact question about whether that officer was acting on the government’s behalf — which is the Kyles question addressed further down.

What is exculpatory evidence?

Exculpatory evidence is evidence that tends to clear a defendant, negate guilt, reduce culpability, or mitigate punishment. Its opposite is inculpatory evidence, which tends to establish guilt. The word “exculpatory” comes from the Latin ex culpa — out of fault or blame — and in ordinary usage the closest synonyms are “exonerating” or “favorable to the defense.”

The legal definition is broader than the everyday one, because Brady attaches to evidence “material either to guilt or to punishment.” Evidence that would not have changed a verdict but would have changed a sentence is squarely within the rule.

Common examples that courts have treated as favorable evidence include:

• A statement from a witness identifying someone else as the perpetrator, or describing a perpetrator who does not match the defendant.
• Forensic results that exclude the defendant — DNA, fingerprints, ballistics, toolmark or trace comparisons that point away rather than toward.
• A prior inconsistent statement by a government witness that contradicts the account given at trial.
• A benefit given to a cooperating witness — a plea agreement, an immunity grant, a promise of a sentencing recommendation, money paid, or immigration relief.
• A witness’s criminal history, pending charges, or pending investigation.
• Evidence undermining a police officer’s account — a body-camera recording, a contemporaneous report inconsistent with later testimony, a disciplinary finding for untruthfulness.
• Information supporting an affirmative defense — duress, entrapment, self-defense, lack of knowledge.
• Evidence bearing on sentencing — facts cutting against a guideline enhancement, an aggravating factor, or the drug quantity or loss amount attributed to the defendant.

Brady itself frames the wrong in institutional rather than adversarial terms. Withholding evidence “casts the prosecutor in the role of an architect of a proceeding that does not comport with standards of justice,” and the Court added the line that gets quoted most often: “Society wins not only when the guilty are convicted but when criminal trials are fair.”

One important limit, stated by the Court itself. Kyles holds that “the Constitution is not violated every time the government fails or chooses not to disclose evidence that might prove helpful to the defense,” and that the Court has “never held that the Constitution demands an open file policy.” The constitutional floor is favorable and material. The gap between “helpful” and “material” is where most disputes live — and it is exactly the gap the Justice Department’s own policy fills in, as the next sections explain.

Impeachment evidence is Brady material too

Giglio v. United States is the case that put witness credibility inside the disclosure duty. The government’s key witness had been promised he would not be prosecuted, the trial prosecutor did not know because a colleague had made the promise, and the jury never heard about it.

The Court’s reasoning has two parts that both remain load-bearing.

Credibility evidence is disclosable. “When the ‘reliability of a given witness may well be determinative of guilt or innocence,’ nondisclosure of evidence affecting credibility falls within this general rule.” And specifically as to cooperation deals: “evidence of any understanding or agreement as to a future prosecution would be relevant to his credibility and the jury was entitled to know of it.”

The office is the government. “The prosecutor’s office is an entity and as such it is the spokesman for the Government. A promise made by one attorney must be attributed, for these purposes, to the Government.” The Court added that “whether the nondisclosure was a result of negligence or design, it is the responsibility of the prosecutor.” An AUSA cannot cure a disclosure failure by not knowing.

Bagley then settled a question the lower courts had split on: whether impeachment evidence was subject to a different standard than exculpatory evidence. It is not. “Impeachment evidence, however, as well as exculpatory evidence, falls within the Brady rule,” because such evidence “if disclosed and used effectively, … may make the difference between conviction and acquittal.” And Bagley adopted a single materiality formulation “sufficiently flexible to cover the ‘no request,’ ‘general request,’ and ‘specific request’ cases”: evidence is material “only if there is a reasonable probability that, had the evidence been disclosed to the defense, the result of the proceeding would have been different,” where “[a] ‘reasonable probability’ is a probability sufficient to undermine confidence in the outcome.”

In everyday federal practice, “Brady material” and “Giglio material” are used as shorthand for two halves of one duty: Brady for evidence that tends to show you did not do it, Giglio for evidence that tends to show the government’s witness should not be believed. Legally there is one rule. Practically the two are produced on different schedules, which the disclosure-taxonomy table below sets out.

The federal disclosure taxonomy

Four different sources of obligation govern what the government hands over in a federal criminal case. They cover different material, come from different places, and are due at different times. Conflating them is the most common reason a defendant thinks he received everything when he did not.

Category	What it covers	Legal source	When it must be produced
Brady material	Evidence favorable to the accused and material either to guilt or to punishment — exculpatory facts, alternative-suspect evidence, forensic results excluding the defendant, mitigating sentencing facts	Brady v. Maryland, 373 U.S. 83 (1963) (Due Process Clause)	No fixed constitutional deadline; in time for effective use at trial. DOJ policy (JM 9-5.001): “reasonably promptly after it is discovered.” Sentencing-related material: “no later than the court’s initial presentence investigation.”
Giglio material	Evidence affecting a government witness’s credibility — cooperation agreements, immunity, payments, prior inconsistent statements, criminal history, findings of untruthfulness or bias	Giglio v. United States, 405 U.S. 150 (1972); United States v. Bagley, 473 U.S. 667 (1985); agency-side process in JM 9-5.100	DOJ policy: “typically … at a reasonable time before trial,” but the prosecutor may balance witness-security and national-security interests and disclose consistent with the Jencks Act instead
Jencks Act statements	Statements of a testifying government witness relating to the subject matter of the testimony — signed or adopted written statements, substantially verbatim contemporaneous recordings, and grand jury testimony	18 U.S.C. §3500	Not before the witness testifies on direct examination. §3500(a) bars subpoena, discovery, or inspection until then; §3500(b) then makes production mandatory on defense motion
Rule 16 discovery	The defendant’s own statements, the defendant’s prior record, documents and objects material to preparing the defense or that the government will use in its case-in-chief, examination and test results, and the government’s expert disclosures	Fed. R. Crim. P. 16 (current version effective Dec. 1, 2023)	On the defendant’s request, on the schedule the court sets. Does not reach prospective government witnesses’ statements “except as provided in 18 U.S.C. § 3500”
Duty to correct false testimony	Testimony the prosecution knows to be false and allows to stand uncorrected — an obligation to act, not merely to produce	Napue v. Illinois; Glossip v. Oklahoma, 604 U.S. 226 (2025)	Immediately, at trial. Glossip: “the Due Process Clause imposes the duty to correct false testimony on the State, not the defense”

The four sources of federal disclosure obligation, plus the duty to correct. Statutory and rule text from 18 U.S.C. §3500, Fed. R. Crim. P. 16, and Fed. R. Crim. P. 5(f); policy text from Justice Manual §§9-5.001 and 9-5.100.

What DOJ policy requires that the Constitution does not

This is the most useful thing on this page for a defendant or family member trying to understand whether something should have been turned over, and it is almost never explained.

The constitutional floor is materiality. Evidence has to be favorable and material — meaning a reasonable probability of a different result. That is a demanding standard, and it is assessed after the fact, by a court, looking backward at a completed trial.

Department of Justice policy sets a lower threshold on purpose. JM 9-5.001 says so directly: “this policy requires disclosure by prosecutors of information beyond that which is ‘material’ to guilt as articulated in Kyles v. Whitley, 514 U.S. 419 (1995), and Strickler v. Greene, 527 U.S. 263, 280-81 (1999).”

Two specific commands follow, and each contains the phrase that matters:

“A prosecutor must disclose information that is inconsistent with any element of any crime charged against the defendant or that establishes a recognized affirmative defense, regardless of whether the prosecutor believes such information will make the difference between conviction and acquittal.”

“A prosecutor must disclose information that either casts a substantial doubt upon the accuracy of any evidence — including but not limited to witness testimony — the prosecutor intends to rely on to prove an element of any crime charged, or might have a significant bearing on the admissibility of prosecution evidence. This information must be disclosed regardless of whether it is likely to make the difference between conviction and acquittal.”

The policy also sets timing that the Constitution does not. Exculpatory information “must be disclosed reasonably promptly after it is discovered.” Impeachment information “will typically be disclosed at a reasonable time before trial to allow the trial to proceed efficiently,” subject to a balancing against witness-security and national-security interests. And exculpatory or impeachment information bearing on a sentencing aggravator “must be disclosed no later than the court’s initial presentence investigation.”

Now the honest caveat, which the policy states in its own words: “This expanded disclosure policy, however, does not create a general right of discovery in criminal cases. Nor does it provide defendants with any additional rights or remedies.”

So what is it worth? Three concrete things. It tells you what to ask for in language the prosecutor’s own office is bound to recognize. It tells you when the office’s internal standard says it should have arrived. And where a court is exercising supervisory authority over discovery — as many district courts do through standing orders and local rules — the government’s own written commitments are the natural reference point for what a reasonable schedule looks like.

Applied Insight — Elizabeth Franklin-Best, Esq., Principal Attorney: A specific request outperforms a general one, and the Supreme Court has said why. Bagley observes that “the more specifically the defense requests certain evidence, thus putting the prosecutor on notice of its value, the more reasonable it is for the defense to assume from the nondisclosure that the evidence does not exist.” When we ask, we ask by category and by name — this agent, this task-force officer, this cooperating witness, these five categories from JM 9-5.100 — rather than filing a form request for “all Brady material.” A specific request that goes unanswered creates a record. A generic one usually does not.

Whose knowledge counts: the prosecution team

A defendant frequently learns that the AUSA who tried the case genuinely did not know about the favorable evidence. That is not a defense, and Kyles v. Whitley is why.

Kyles holds that because the prosecution is charged with knowledge of what its side knows, “the individual prosecutor has a duty to learn of any favorable evidence known to the others acting on the government’s behalf in the case, including the police.” And whether the prosecutor succeeds or fails at that, “the prosecution’s responsibility for failing to disclose known, favorable evidence rising to a material level of importance is inescapable.”

Two related principles from Kyles shape how the duty is measured, and both matter to what has to be produced:

Materiality is cumulative, not item-by-item. Kyles stresses “its definition in terms of suppressed evidence considered collectively, not item by item.” Three pieces of evidence that would each be unremarkable alone can be material together. A production decision made document by document is measuring the wrong thing.

Materiality is about confidence, not about a predicted acquittal. “The question is not whether the defendant would more likely than not have received a different verdict with the evidence, but whether in its absence he received a fair trial, understood as a trial resulting in a verdict worthy of confidence.”

The practical question in most federal cases is who is on the team. The prosecuting AUSA, the case agents, and the investigative agency are clearly within it. Task-force officers detailed from state or local departments generally are. Whether a state or local agency that assisted counts is evaluated case by case; the Justice Manual’s discovery provisions note that “[c]ourts will generally evaluate the role of a state or local law enforcement agency on a case-by-case basis.” That determination is worth making early, because it decides whose files and whose disciplinary history are in play.

When does the government have to disclose this?

There is no single constitutional deadline, and the honest answer has four parts.

At the first appearance, the judge must say it out loud. The Due Process Protections Act of 2020 added Fed. R. Crim. P. 5(f), effective October 21, 2020: “In all criminal proceedings, on the first scheduled court date when both prosecutor and defense counsel are present, the judge shall issue an oral and written order to prosecution and defense counsel that confirms the disclosure obligation of the prosecutor under Brady v. Maryland, 373 U.S. 83 (1963) and its progeny, and the possible consequences of violating such order under applicable law.” The rule also provides that “[e]ach judicial council in which a district court is located shall promulgate a model order” for that purpose. Those model orders differ by circuit and are worth reading — they are the clearest statement of what a specific court expects and what it will do about a violation, and they are public.

The constitutional standard is functional: in time for effective use. Brady itself sets no schedule. Courts assess whether disclosure came early enough that the defense could actually use it — investigate it, retain an expert on it, build a cross-examination around it. Late disclosure can therefore still be a violation even when the material eventually arrives, because material handed over mid-trial may be material that could not be used.

The Jencks Act cuts the other way, and it is a statute. 18 U.S.C. §3500(a) provides that “no statement or report in the possession of the United States which was made by a Government witness or prospective Government witness (other than the defendant) shall be the subject of subpena, discovery, or inspection until said witness has testified on direct examination.” When the material is both Giglio and Jencks, the government frequently produces it on the Jencks schedule — and JM 9-5.001 expressly contemplates that “required disclosures may be made at a time and in a manner consistent with the policy embodied in the Jencks Act.” In practice most districts have a local rule, standing order, or scheduling practice that moves Jencks production earlier; that local practice, not the statute, is what usually determines the real date.

Before a guilty plea, the Constitution requires less than most people assume. United States v. Ruiz, 536 U.S. 622, 625 (2002) holds that “the Constitution does not require the Government to disclose material impeachment information relating to informants or other witnesses before entering into a binding plea agreement with a criminal defendant.” The same opinion declines to require pre-plea disclosure of information regarding affirmative defenses. This is a genuinely consequential rule: the overwhelming majority of federal cases resolve by plea, and Ruiz means a defendant can plead guilty without ever seeing the impeachment file on the witnesses against him. Note what Ruiz did not hold — the plea agreement in that case itself provided that the government would turn over “any information establishing the factual innocence of the defendant,” and the Court relied on that fact. Where the real problem is that counsel’s advice about the plea was wrong, the claim is a different one, addressed at ineffective assistance and the guilty plea; and whether a plea agreement’s waiver clause bars a later collateral attack at all belongs to appeal waivers and collateral-attack waivers.

Rule 16 and the Jencks Act: what they do and do not cover

These are the two provisions defendants most often assume will produce the favorable material. Neither is designed to.

Fed. R. Crim. P. 16 is reciprocal discovery, not a disclosure-of-favorable-evidence rule. On the defendant’s request the government must produce the defendant’s own oral, written, and recorded statements and grand jury testimony; the defendant’s prior criminal record; documents, data, photographs, and tangible objects that are “material to preparing the defense,” that the government intends to use in its case-in-chief, or that were obtained from or belong to the defendant; and the results of physical or mental examinations and scientific tests that are material to the defense or that the government will use in its case-in-chief. Since the amendments effective December 1, 2022, it also requires a detailed written expert disclosure — a complete statement of the opinions the government will elicit, the bases and reasons for them, the witness’s qualifications including publications from the previous 10 years, and a list of other cases in which the witness testified as an expert in the previous 4 years.

What Rule 16 does not do is supply witness statements. The rule says so in terms: it does not “authorize the discovery or inspection of statements made by prospective government witnesses except as provided in 18 U.S.C. § 3500.”

The Jencks Act, 18 U.S.C. §3500, then supplies them — after the witness testifies. Section 3500(b) is mandatory once triggered: after direct examination “the court shall, on motion of the defendant, order the United States to produce any statement … of the witness in the possession of the United States which relates to the subject matter as to which the witness has testified.” The statute defines “statement” narrowly — a written statement the witness signed or otherwise adopted or approved; a “substantially verbatim recital of an oral statement … recorded contemporaneously”; or grand jury testimony. That definition is why an agent’s summary interview report is often not a Jencks statement of the witness interviewed. The full statutory scheme — the §3500(e) definition, the after-direct-examination trigger, the reverse-Jencks obligation under Fed. R. Crim. P. 26.2, and what a Jencks failure is worth after conviction — is covered on our page on Jencks Act witness statements.

The Act also carries its own enforcement. If the government declines to comply with a production order, “the court shall strike from the record the testimony of the witness, and the trial shall proceed unless the court in its discretion shall determine that the interests of justice require that a mistrial be declared.” Section 3500(c) provides the in camera procedure for excising unrelated material.

The takeaway for a defendant reading his own file: getting full Rule 16 discovery is not the same as getting Brady and Giglio material, and receiving Jencks material at trial is not evidence that everything favorable was produced. They are three separate obligations from three separate sources. Which of the resulting complaints belongs on direct appeal and which belongs in a collateral motion is worked through at direct appeal versus a §2255 motion.

How do I find out whether any of this exists in my case?

This is the operational question, and the answer differs sharply depending on where you are in the case.

While the case is pending

1. Read the Rule 5(f) order. It was entered at your first appearance and it is on the docket. It states what the judge has ordered the government to do and what happens if the government does not.
2. Make specific written requests. Name the agents and task-force officers. Name the cooperating witnesses. Ask by the JM 9-5.100 categories rather than by the phrase “Brady material.” Bagley explains why specificity has legal consequence.
3. Ask whether a Giglio request was actually made. The Justice Manual process is triggered by the prosecutor asking the Agency Official. Whether that request was made, and when, is a fair subject of inquiry.
4. Ask about the whole team. Confirm which agencies participated and whether any state or local officers were detailed to the investigation, so the Kyles scope question is answered in advance rather than after trial.
5. Move to compel and get a ruling. A denied motion creates a record. An unanswered letter often does not.

After conviction

The tools are narrower, slower, and mostly documentary.

1. The docket and the record. Later filings by co-defendants — sentencing memoranda, cooperation motions, appellate briefs — routinely surface material that was never disclosed in your case.
2. Public findings about the agents involved. Inspector General reports, published court decisions in other cases making findings about a particular agent’s testimony, and agency disciplinary determinations that become public are the most common way a post-conviction Brady problem surfaces years later.
3. Rule 6 discovery in the §2255 itself. Rule 6, Rules Governing Section 2255 Proceedings, permits a judge “for good cause” to “authorize a party to conduct discovery under the Federal Rules of Criminal Procedure or Civil Procedure.” It also requires the requesting party to “provide reasons for the request,” to attach any proposed interrogatories and requests for admission, and to “specify any requested documents.” Rule 6(a) adds that “[i]f necessary for effective discovery, the judge must appoint an attorney for a moving party who qualifies to have counsel appointed under 18 U.S.C. §3006A.” A request that names the documents and explains what they would show is treated very differently from one that asks for the file.
4. FOIA and Privacy Act requests, which reach agency records but are subject to exemptions for law-enforcement records and personnel privacy, and are slow.
5. Trial counsel’s file. Often the fastest source of the answer to a narrower question: what was produced, and when.

If the district court orders a hearing on the resulting claim, that is where the government’s witnesses can finally be examined about what was known and when — see the §2255 evidentiary hearing. Getting there starts with a correctly filed motion; the mechanics are at how to file a §2255 motion, and the claim inventory at grounds for a §2255 motion.

Applied Insight — Christopher Zoukis, JD, MBA, Managing Director: People inside frequently hear that an agent from their case was disciplined or discredited, and the information arrives as a rumor from someone in the unit rather than as a document. Rumors do not go in a filing, but they are worth running down, and the way to run them down is documentary — the agent’s later testimony in another published case, an Inspector General report, a docket in a different prosecution. The date the underlying document became findable is the date that matters for the §2255 clock, so it is worth writing down when and how you first learned anything, before the details blur. The legal assessment of what to do with it is made by the firm’s attorneys.

What if I only found out after my conviction?

Two things happen at once, and both are time-sensitive.

A clock may have started. 28 U.S.C. §2255(f)(4) runs the one-year limitation period from “the date on which the facts supporting the claim or claims presented could have been discovered through the exercise of due diligence.” Note the wording: not the date you actually found out, but the date reasonable diligence would have surfaced it. Late-discovered suppressed evidence is the classic §2255(f)(4) fact pattern, and the trigger is fought over on exactly that difference. Computing the date from real events is the subject of the §2255 deadline calculator, and if the year has already closed the doctrine that may save the filing is equitable tolling. If you have already filed one §2255 motion, a newly discovered suppression must clear the far stricter statutory gate at second or successive §2255 motions, and if the withheld material also shows you did not commit the offense, see actual innocence.

A procedural obstacle may have already been solved. If you never raised the claim on direct appeal — and you could not have, because you did not know — the government’s suppression is itself the classic ground for excusing the default. Strickler v. Greene, 527 U.S. 263, 289 (1999), found cause established by the combination of the prosecution withholding evidence, the petitioner’s reasonable reliance on an open-file policy, and the government’s affirmative representation that everything known to it had been produced. That doctrine belongs to procedural default, which covers the cause-and-prejudice analysis.

What this page deliberately does not do is teach you how to litigate the claim. How a suppressed-evidence claim is pleaded and proved in a §2255 motion — the elements, the materiality showing, the remedy — belongs to Brady violation. If the conduct you have discovered goes beyond nondisclosure into knowingly false testimony, improper argument, or evidence fabrication, that is prosecutorial misconduct. And where the problem is that your own lawyer had the material and did nothing with it, that is a different claim entirely — see ineffective assistance of counsel.

One development worth knowing about, because it is recent and because it concerns the government’s affirmative duty rather than its production schedule: in Glossip v. Oklahoma, 604 U.S. 226 (2025), the Supreme Court held that the prosecution violated its constitutional obligation to correct false testimony. Under Napue, “a conviction obtained through the knowing use of false evidence violates the Fourteenth Amendment’s Due Process Clause,” and “[t]o establish a Napue violation, a defendant must show that the prosecution knowingly solicited or allowed false testimony to go uncorrected.” Glossip also confirms that “the Due Process Clause imposes the duty to correct false testimony on the State, not the defense” — the obligation does not shift because defense counsel might have caught the lie.

Is this a habeas case at all?

A practical orientation question, because a lot of people arrive here from the wrong direction. A challenge to a federal conviction by someone still in custody is a §2255 motion filed in the sentencing court — technically a further step in the criminal case rather than a separate civil habeas action, though it is habeas in substance. A challenge to a state conviction is a §2254 petition. If the terminology itself is the obstacle, start with what habeas corpus actually means; if what you need is to know who handles these cases and whether yours is one of them, see habeas corpus attorney.

The distinction matters for this page specifically, because the disclosure sources described above are federal. State prosecutions are governed by state discovery statutes, state Brady-list practices, and state public-records law, all of which vary enormously — including whether a jurisdiction maintains a published Brady list at all and whether it is subject to public disclosure.

One threshold requirement catches people who discover a disclosure problem years later. Section 2255(a) opens with the words “[a] prisoner in custody,” and custody is a condition of the remedy. Someone whose sentence has fully expired — as distinct from someone still on supervised release, which courts treat as custody — cannot use §2255 at all, no matter how strong the suppressed-evidence claim. The remedy for a person no longer in custody is the writ of coram nobis, which has its own standards and its own showing of continuing consequences; that route is covered at coram nobis. Establishing custody status is therefore the first question, before anyone assesses what should have been disclosed.

Why work with Elizabeth Franklin-Best, P.C.

Elizabeth Franklin-Best, P.C. is a boutique federal criminal defense and appellate firm founded in 2019, with offices in Columbia and Mount Pleasant, South Carolina, serving clients nationwide. Elizabeth Franklin-Best has more than 20 years of federal and appellate criminal defense experience, has handled more than 330 federal proceedings, over 100 of them appeals, with sixteen published decisions as counsel of record, and is admitted to the U.S. Supreme Court and twelve of the thirteen U.S. Courts of Appeals — every regional circuit (1st–11th) plus the D.C. Circuit. She is recognized by Best Lawyers in America 2026 for Appellate Practice and by Chambers USA 2026 for Litigation: White-Collar Crime & Government Investigations, and is the author of Reversing Your Criminal Conviction: Develop Your Winning Strategy (2023).

Disclosure questions are reconstruction work: what existed, who had it, when it was produced, and what the docket shows about each. The firm runs a national federal practice on an intentionally small caseload, and has been admitted pro hac vice in federal courts from Montana to Florida. What a lawyer can still do once the direct appeal is over is set out at post-conviction attorney; where the underlying problem is a conviction of someone who did not commit the offense, see wrongful conviction lawyer.

Talk to a federal defense lawyer about disclosure in your case

If you believe favorable evidence in your federal case was never turned over — or you have learned something about an agent or a witness that was not disclosed at the time — the first questions are documentary: what exists, and when it became findable.

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Frequently Asked Questions About Brady Material

Reviewed for legal accuracy by Elizabeth Franklin-Best, Esq., Principal Attorney·September 2026