Federal Motion to Reveal a Confidential Informant

What a Motion to Reveal the Informant Does

In federal prosecutions, the government ordinarily may keep the identity of a confidential informant secret. Courts call this protection the informer's privilege. In Roviaro v. United States, 353 U.S. 53, 59 (1957), the Supreme Court described it as the government's privilege to withhold the identity of persons who furnish information about violations of law to the officers who enforce it. A Motion to Reveal a Confidential Informant is the defense filing that asks a federal court to set that privilege aside and order the government to name its source.

The privilege exists for a practical reason. It encourages citizens to report crime by promising them anonymity, which in turn supports effective law enforcement. But the privilege has never been absolute. As the Court explained, it is limited by the fundamental requirements of fairness. Where disclosure of an informant's identity is relevant and helpful to the defense, or is essential to a fair determination of the case, the privilege must give way, and the trial court may compel disclosure. See Roviaro, 353 U.S. at 60-61.

The motion matters most in cases built on undercover buys, controlled deliveries, and tips that lead to a search or arrest. In those situations the informant may be the only witness other than the defendant to a decisive event. Learning who the informant is can open the door to interviews, impeachment, and a defense the accused could not otherwise present. This guide explains the standard that governs the motion, the factual distinctions that usually decide it, the procedure federal judges follow, and the remedies available when the government declines to comply.

The Roviaro Balancing Test

Roviaro refused to lay down a fixed rule for or against disclosure. Instead, the Court held that the question calls for balancing the public interest in protecting the flow of information against the individual's right to prepare a defense. Whether nondisclosure is erroneous depends on the particular circumstances of each case, taking into account the crime charged, the possible defenses, the possible significance of the informant's testimony, and other relevant factors. See Roviaro, 353 U.S. at 62.

The Fifth Circuit has translated that open-ended inquiry into a working framework. In United States v. Mendoza-Burciaga, 981 F.2d 192 (5th Cir. 1993), the court applied a three-part test that weighs (1) the level of the informant's involvement in the alleged criminal activity, (2) the helpfulness of disclosure to the asserted defense, and (3) the government's interest in nondisclosure. No single factor controls; the trial judge weighs them together on the facts presented.

The most important variable is usually the informant's role. The more central the informant was to the charged conduct, the more likely the account bears on guilt, intent, or a defense such as entrapment or misidentification. A defendant who can tie the informant to a specific, plausible defense theory stands on far stronger ground than one who offers only a general hope that the source might say something useful.

Tipster Versus Active Participant

The single most decisive question is what the informant actually did. Federal courts sort informants along a spectrum. At one end sits the mere tipster, who only passes along information that helps officers develop probable cause but takes no part in the offense. At the other end sits the active participant, who takes part in the charged transaction and can testify about what happened.

The Fifth Circuit drew this line clearly in United States v. Suarez, 582 F.2d 1007 (5th Cir. 1978). Where the informant played an active and crucial role in the events underlying the charge, disclosure and production are in all likelihood required to ensure a fair trial. Where the informant was a mere tipster, disclosure is not required by Roviaro. Roviaro itself fell at the participant end: the informant there was the only person besides the accused who took part in the charged sale, so the government had to reveal the source or face dismissal.

Between the two extremes lies a middle category, where the informant saw something useful but was not central. In those cases disclosure is not automatic. As Suarez explained, the trial court may hold an in camera proceeding to weigh the importance of the informant's testimony to the defense against the strength of the government's need for secrecy. Framing an informant as a participant rather than a tipster is therefore the heart of most successful motions.

When It Is Filed and the Defendant's Threshold Showing

A Motion to Reveal a Confidential Informant is a pretrial motion. Defense counsel usually files it during the discovery phase, sometimes alongside a request for a bill of particulars or a motion to compel discovery. Filing early gives the court time to hold a hearing and, if disclosure is ordered, gives the defense time to locate and interview the source before trial.

The defendant carries the initial burden. Courts do not order disclosure on request; the defense must show that the informant's testimony would be material and helpful to a specific defense. A bare assertion that the informant 'might' have useful information is not enough, because mere speculation cannot outweigh the government's interest in protecting its sources. The defense should connect the informant to a concrete theory, such as entrapment, lack of knowledge, mistaken identity, or an absent element the informant could address.

Practical support strengthens the showing. Police reports, the criminal complaint, wiretap summaries, and the government's own descriptions of the investigation often reveal how deeply the informant was involved. When those materials show the informant set up the deal, was present at the exchange, or was the sole percipient witness to a charged act, the motion moves from speculation to substance. When they show only that a source pointed officers toward the defendant, the motion is far weaker. The stronger the tie between the informant and a triable issue, the more likely the court is to order disclosure or, at minimum, an in camera hearing.

Procedure and In Camera Review

When the government resists disclosure but the defense has made a colorable showing, federal courts often turn to in camera review. The judge examines the question privately, outside the jury and usually outside the defense, so the court can assess what the informant knows without prematurely exposing the identity if disclosure turns out not to be warranted.

The procedure varies. A judge may accept a sealed, ex parte written proffer from the government describing the informant's role, may question the case agent under oath, or may question the informant directly in chambers. In United States v. Coy Jones, 930 F.3d 366 (5th Cir. 2019), for example, the district court held an ex parte hearing and then denied disclosure after the government represented that the source only gave a tip and would not be a trial witness. The Fifth Circuit has also suggested, as a second-best alternative, allowing defense counsel to attend the in camera hearing under a protective gag order, as discussed in United States v. Singh, 922 F.2d 1169 (5th Cir. 1991).

In camera review protects both sides. It lets the defendant obtain disclosure when the informant is genuinely material, while allowing the government to preserve secrecy when the source is peripheral or at risk. Because the judge builds a sealed record, the ruling can be reviewed on appeal without the identity becoming public in the meantime. Defense counsel should ask the court to memorialize the in camera proceeding under seal so the issue is preserved for later review.

Disclosure at a Suppression Hearing

The analysis shifts when the informant matters only to probable cause. Suppose officers searched a car or a home based on a tip, and the defense moves to suppress. The defendant may want the source's identity to challenge whether probable cause really existed. Here the trial-fairness rationale of Roviaro applies with much less force, because the issue is not guilt but the lawfulness of the search.

The Supreme Court addressed this posture in McCray v. Illinois, 386 U.S. 300 (1967). The Court held that neither the Due Process Clause nor the Confrontation Clause compels disclosure of an informant's identity at a probable-cause hearing when the officers testify in open court, under oath, and subject to cross-examination, and the judge is satisfied they relied in good faith on a reliable source. A judge need not presume the officers are lying. As a result, a defendant usually cannot obtain the informant's name simply by filing a suppression motion.

To pierce the privilege at the suppression stage, the defense generally must attack the affidavit itself. Under Franks v. Delaware, 438 U.S. 154 (1978), a defendant who makes a substantial preliminary showing that the affidavit contained a deliberate or reckless falsehood necessary to probable cause may earn an evidentiary hearing. Even then, the Supreme Court expressly left open whether a court must ever require the informant's identity to be revealed. The realistic path at suppression is a veracity challenge to the affidavit, not a Roviaro demand for a fair trial.

The Remedy: Disclosure or Dismissal

When the balance favors the defense, the court orders the government to disclose the informant's identity, and often a last-known address, so the defense can investigate. The government then faces a choice. It can comply, or it can refuse to protect the source. If it refuses after being ordered to disclose, the court may strike related testimony or dismiss the affected counts. Roviaro made this explicit: if the government withholds information the defense is entitled to, the court may dismiss the action.

Dismissal is not the only tool. Depending on the harm, a court may grant a continuance so the defense can find the source, order the government to produce the informant for an interview, suppress evidence that flowed from the informant, or give a jury instruction. The choice of remedy tracks the prejudice the nondisclosure would cause.

If the informant will testify at trial, a different rule takes over. Under Smith v. Illinois, 390 U.S. 129 (1968), the defense is normally entitled to the witness's real name and address, because those basic facts open the door to cross-examination and investigation. Courts sometimes allow a testifying informant to use a pseudonym when there is a real safety concern, but only if the defense still receives enough background, such as criminal history and cooperation payments, to conduct a meaningful cross-examination. See United States v. Alaniz, 726 F.3d 586 (5th Cir. 2013).

Standard of Review and Where the Motion Fits

On appeal, a district court's decision on informant disclosure is reviewed for abuse of discretion, and the underlying factual findings are reviewed for clear error. See United States v. Mendoza-Burciaga, 981 F.2d 192 (5th Cir. 1993). That deferential standard makes the trial record decisive. A defendant who wants to preserve the issue must build a clear record of the specific defense the informant would support and must obtain a ruling, ideally memorialized in a sealed in camera proceeding.

The motion sits within the broader pretrial motions practice in a federal criminal case. It commonly travels with a Rule 16 discovery motion, a demand for exculpatory and impeachment evidence under Brady and Giglio, and, where a search is involved, a motion to suppress. Overlap is common: information that identifies a paid or cooperating informant can also be Giglio impeachment material the government must disclose regardless of the Roviaro balance.

Timing and framing decide most of these motions. The defense that files early, ties the informant to a real and specific defense, and asks for in camera review as a fallback gives the court a workable path to disclosure. The defense that waits and speaks only in generalities usually loses. L and L Law Group, PLLC, a Frisco, Texas criminal-defense firm whose partners are admitted in the Northern and Eastern Districts of Texas and the Fifth Circuit, handles motions of this kind. This article is general legal information, not legal advice, and does not create an attorney-client relationship; consult a lawyer about your specific case.

Common Situations & Variations

This motion comes up in several recurring situations. Each guide below walks through a specific fact pattern, the governing standard, and how Federal courts have handled it.

What the Case Law Says

These decisions—verified against primary sources—control how this motion is litigated. Every case still turns on its own facts.

• Roviaro v. United States, 353 U.S. 53 (1957) — The informer's privilege yields where disclosing the informant's identity is relevant and helpful to the defense or essential to a fair trial.
• McCray v. Illinois, 386 U.S. 300 (1967) — The Constitution does not compel disclosing an informant's identity at a probable-cause hearing where officers testify credibly and the informant was only a tipster.
• United States v. Suarez, 582 F.2d 1007 (5th Cir. 1978) — Disclosure is likely required when the informant actively participated in the charged transaction, but not when the informant was a mere tipster.
• United States v. Mendoza-Burciaga, 981 F.2d 192 (5th Cir. 1993) — The Fifth Circuit weighs three factors: the informant's involvement level, disclosure's helpfulness to the defense, and the government's interest in nondisclosure.

General summaries of published opinions for information only — not predictions about any specific case.