Brady Evidence and Hidden Exculpatory Information in Federal Cases

Federal prosecutors have a constitutional duty to disclose material evidence favorable to the accused. That obligation includes evidence that supports innocence, reduces culpability, undermines a government witness, or supports a defense theory.

A Brady violation can affect whether a defendant receives a fair trial. If you believe federal prosecutors withheld favorable evidence, contact federal criminal defense attorney Michael J. Petro immediately to determine whether the nondisclosure can be challenged.

What Is Brady Evidence?

In Brady v. Maryland, 373 U.S. 83 (1963), the Supreme Court held that the prosecution violates due process by suppressing material evidence favorable to the accused.

Brady evidence includes both exculpatory and impeachment evidence.

Exculpatory evidence may support innocence, contradict the government’s theory, reduce the defendant’s role, support an affirmative defense, or lessen punishment.

Impeachment evidence may expose a government witness’s bias, inconsistent statements, criminal conduct, cooperation agreement, financial benefit, expectation of leniency, or motive to lie.

The prosecution’s disclosure obligation applies even when the prosecutor personally does not possess the evidence. Prosecutors generally must be made aware of favorable evidence known to law enforcement officers and other members of the prosecution team.

What Must a Defendant Prove?

A Brady claim generally requires the defendant to establish three things:

• The evidence was favorable to the defense

• The government suppressed the evidence

• The evidence was material to guilt or punishment

Evidence is material when there is a reasonable probability that timely disclosure would have produced a different result. A reasonable probability does not require proof that acquittal was more likely than conviction. The question is whether the withheld evidence undermines confidence in the outcome.

Courts must consider suppressed evidence collectively rather than evaluating each item in isolation.

Patent and Latent Exculpatory Evidence

In United States v. Gray, 648 F.3d 562 (7th Cir. 2011), the Seventh Circuit used the terms “patent” and “latent” to describe two types of potentially favorable evidence.

Patent exculpatory evidence is favorable on its face. A statement from another person accepting complete responsibility for the crime and describing the defendant as innocent would be an obvious example.

Latent exculpatory evidence is information whose significance becomes apparent only after it is analyzed, processed, or combined with other information.

The patent-latent distinction can be helpful, but it is not a separate constitutional test that replaces Brady. Courts still examine whether favorable evidence existed, whether it was suppressed by the prosecution, and whether it was material.

United States v. Gray

Wynell Gray was convicted of health care fraud and conspiracy arising from fraudulent transportation claims submitted to Indiana Medicaid.

Gray maintained that another participant supplied the billing codes and false records and that she did not knowingly submit fraudulent claims. Before trial, the defense requested the company’s Medicaid billing information. The government obtained electronic data from a private contractor that processed Indiana Medicaid claims and provided that data to the defense.

The original data included thousands of billing records but did not display the precise time each claim was submitted. During trial, the private contractor wrote and ran a computer program that extracted timestamp information for one day.

The extracted information showed multiple claims submitted within seconds of one another. This indicated that more than one person had probably submitted claims that day.

Gray argued that the government should have extracted and disclosed that information before trial. The Seventh Circuit rejected the Brady claim.

Brady Does Not Generally Require the Government to Create Evidence

The court concluded that the private billing contractor was not part of the prosecution team. It processed Medicaid claims but did not investigate the criminal case or assist prosecutors in preparing it.

The defense also received the same underlying data as the government. The timestamp report did not exist until the contractor created and ran a new program during trial.

The Seventh Circuit explained that Brady requires disclosure of qualifying evidence in the government’s possession. It does not ordinarily require prosecutors to create new evidence, perform defense analysis, or develop a new computer program to uncover potentially favorable information.

That principle does not mean prosecutors can avoid Brady by leaving favorable evidence buried in electronic files. The result depends on what information already exists, who possesses it, whether the holder is part of the prosecution team, and whether the government has disclosed the information in a reasonably usable form.

Who Is Part of the Prosecution Team?

Brady extends beyond documents physically located in the prosecutor’s office. The government may be responsible for favorable information known to agents, investigators, and others who participated in the investigation or prosecution.

Relevant questions include:

• Whether the person or agency helped investigate the defendant

• Whether prosecutors directed or controlled its work

• Whether the agency gathered evidence for the prosecution

• Whether prosecutors had access to its records

• Whether information was shared among the participating agencies

• Whether the investigation was conducted jointly

A private business or separate government agency is not automatically part of the prosecution team merely because it possesses relevant records. The relationship between the prosecutors, investigators, and record holder must be examined.

Electronic Data Can Contain Hidden Defense Evidence

Federal investigations routinely involve emails, text messages, financial records, databases, spreadsheets, location information, and other electronically stored evidence. Favorable information may not be apparent from a superficial review.

Defense counsel may need to determine:

• Whether the government produced complete native files

• Whether metadata was preserved

• Whether databases contain searchable fields not visible in exported reports

• Whether timestamps, audit trails, or user records identify another actor

• Whether information was altered, filtered, summarized, or omitted

• Whether the prosecution performed analyses that were not produced

• Whether law enforcement possesses different versions of the data

The government may not have a duty to create a defense expert’s analysis. It may, however, have a duty to disclose existing favorable records, reports, communications, or analytical results possessed by the prosecution team.

Timing of Brady Disclosure Matters

Favorable evidence must be disclosed in time for the defense to use it effectively. A disclosure during trial may be too late when the defense needed the evidence to investigate witnesses, retain an expert, prepare cross examination, change trial strategy, or pursue additional records.

The government cannot necessarily cure every Brady problem by producing evidence immediately before it is introduced. Defense counsel should document when the evidence was requested, when the government obtained it, when it was disclosed, and how the delay impaired its effective use.

Challenging Suppressed Evidence in Federal Court

A Brady issue may support a motion to compel disclosure, a request for a continuance, a motion to exclude evidence, a motion for a new trial, or postconviction relief. The available remedy depends on when the violation is discovered and how it affected the defense.

Attorney Michael J. Petro represents individuals facing federal charges in Tampa, Florida, and Chicago, Illinois. Contact federal criminal defense attorney Michael J. Petro today if prosecutors may have withheld evidence favorable to your defense.