Brady & Giglio Issue Spotter

1. Brady v. Maryland and the disclosure duty

In Brady v. Maryland, 373 U.S. 83 (1963), the Supreme Court held that 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. Three later cases shape modern Brady doctrine: United States v. Agurs, 427 U.S. 97 (1976) (no request needed for clearly exculpatory evidence); United States v. Bagley, 473 U.S. 667 (1985) (materiality means a reasonable probability that the result would have been different); and Kyles v. Whitley, 514 U.S. 419 (1995) (cumulative effect of all undisclosed evidence is the proper measure, and the prosecutor must learn what the police know).

The duty runs to the prosecution as an entity, not just to the trial prosecutor. Kyles imposes an affirmative duty on the prosecutor to learn of favorable evidence known to others acting on the government's behalf, including the police. That principle is the doctrinal foundation for most modern Brady litigation — a Brady demand is, in practice, also a demand on the investigative agency's file.

2. Giglio v. United States and impeachment material

In Giglio v. United States, 405 U.S. 150 (1972), the Court extended Brady to impeachment material — evidence that bears on the credibility of a government witness. The undisclosed evidence in Giglio was a promise of leniency to a cooperator. The Court reversed because the cooperator's credibility was an important issue and the jury had not heard the promise.

Giglio material typically includes: plea agreements and cooperation deals, monetary payments to informants, immunity grants, prior inconsistent statements, prior false statements, sustained findings of dishonesty against testifying officers, civil judgments for excessive force or fabrication, prior bad acts admissible under Federal Rule of Evidence 608(b) or Texas Rule of Evidence 608(b), prior convictions admissible under Rule 609, and pending criminal investigations that might motivate cooperation.

Many U.S. Attorney's Offices and Texas county prosecutor offices maintain a Brady list (sometimes called a Giglio list or a do-not-call list) — a roster of law enforcement witnesses whose disciplinary history triggers a Giglio disclosure obligation. Access to those lists varies. In some Texas counties they have been the subject of public records litigation.

3. Texas: Michael Morton Act (CCP article 39.14) — broader than federal Brady

Texas Code of Criminal Procedure article 39.14, as amended by the Michael Morton Act effective January 1, 2014, dramatically expanded state discovery. On a timely request from the defense, the State must produce and permit inspection, copying, or photographing of any offense reports, witness statements (including witness statements of law enforcement officers but not work product), and any books, accounts, letters, photographs, or objects, or any designated documents, papers, written or recorded statements of the defendant or a witness, including statements at any time made by the witness in connection with the case, and any other tangible things not otherwise privileged that constitute or contain evidence material to any matter involved in the action and that are in the possession, custody, or control of the State or any person under contract with the State. Tex. Code Crim. Proc. art. 39.14(a).

Subsection (h) imposes a continuing duty: as soon as practicable after receiving a timely request, the state shall disclose to the defendant any exculpatory, impeachment, or mitigating document, item, or information in the possession, custody, or control of the state that tends to negate the guilt of the defendant or would tend to reduce the punishment for the offense charged. Subsection (k) makes the duty continuing through trial and post-trial.

The Morton Act is broader than Brady in three important ways: (1) materiality is to any matter, not just outcome-determinative materiality; (2) the duty is triggered by a defense request, not by the prosecutor's own assessment; and (3) disclosure of exculpatory and impeachment material is a separate statutory command with no good-faith defense.

4. Federal: Jencks Act + Rule 16 + Brady

Federal discovery in criminal cases is layered. Federal Rule of Criminal Procedure 16 requires the government, on defense request, to disclose the defendant's statements, criminal history, documents and objects material to the defense or that the government intends to use at trial, examinations and tests, and expert witnesses. Rule 16 does not require disclosure of witness statements before trial.

The Jencks Act, 18 U.S.C. § 3500, governs witness statements. Under Jencks, a witness's prior statements need not be produced until after the witness testifies on direct examination. Rule 26.2 codifies Jencks for both sides. In practice, most U.S. Attorney's Offices produce Jencks material some days before trial under standing orders or scheduling orders to avoid mid-trial delay.

The Brady and Giglio obligations sit on top of Rule 16 and the Jencks Act. Brady material that is also Jencks material must be produced consistent with Brady's timing requirements, which generally means in time for effective use at trial. The Department of Justice Justice Manual § 9-5.001 captures the prosecutorial policy as broader than constitutional minima.

5. Witness-specific demands (cops, informants, experts)

Different categories of witnesses generate different Brady/Giglio demands. For testifying law enforcement officers, the defense should demand sustained disciplinary findings (especially for dishonesty, evidence tampering, perjury, or excessive force), civil suits alleging civil rights violations or fabrication, prior internal affairs investigations, training records relevant to the testimony, and any Brady or Giglio list status. Disclosure of personnel files in Texas implicates Texas Government Code chapter 552 (the Public Information Act) and CCP article 39.14(f) — the standard route is a subpoena duces tecum and, where the State objects, in camera inspection.

For confidential informants, the defense should demand cooperation agreements, monetary payments, immunity grants, the informant's criminal history, prior testimony in other cases, sustained credibility findings, and pending charges that might motivate cooperation. Identification of the informant is governed by Roviaro v. United States, 353 U.S. 53 (1957) — disclosure is required where the informant's identity is relevant and helpful to the defense or essential to a fair determination of guilt.

For experts, the defense should demand the expert's prior testimony transcripts, methodology and validation, any disciplinary findings against the expert, any prior testimony excluded under Daubert or Texas Rule 702, the expert's published writings, and the underlying data and notes. For forensic experts in particular, lab proficiency testing, bench notes, machine calibration records, and quality assurance documentation are routine targets.

6. Procedural mechanics: motion compel, sanctions, preservation of error

A Brady or Giglio claim is preserved by a specific request, a specific ruling, and a clear record. The standard sequence in a Texas case is: serve a written article 39.14 request and a Brady demand; if disclosure is incomplete, file a motion to compel; if the State asserts privilege, request in camera review; obtain a ruling on the record; and renew the request as new witnesses emerge or as trial approaches.

Remedies for a Brady or article 39.14 violation include continuance, additional discovery, exclusion of evidence, a curative instruction, mistrial, dismissal, and post-conviction relief. The Texas standard for a Morton Act violation includes a willfulness inquiry under Pena v. State, 353 S.W.3d 797 (Tex. Crim. App. 2011) and progeny — but the article 39.14 duty is not coterminous with willfulness and a non-willful violation can still support relief. In federal court, the materiality standard from Bagley governs reversal: there must be a reasonable probability that, had the evidence been disclosed, the result would have been different.

The cumulative-effect rule from Kyles matters at trial and on appeal. Counsel should make a record of every individual undisclosed item, even if the trial court rules each one not material on its own, because the appellate analysis aggregates them.