The prosecution does not get to hide evidence that helps you. When it does, that is a Brady violation, and it can have serious consequences for the case against you. I am Joel Brand, and here is what a Brady violation is and how it comes up in DUI cases.

The prosecution's duty to disclose

Under Brady v. Maryland, the prosecution has a constitutional obligation to turn over evidence that is favorable to the defense and material to guilt or punishment. This duty applies whether or not the defense asks for the evidence, and it includes evidence held by the police, not just what sits in the prosecutor's own file. A failure to disclose such evidence is a Brady violation, and it is a violation of due process, not merely a discovery dispute.

What "favorable" and "material" mean

Favorable evidence is anything that tends to help the defense, either by pointing toward innocence or by undermining the credibility of the prosecution's witnesses. Material means there is a reasonable probability that, had the evidence been disclosed, the result could have been different. These two concepts define the scope of the duty: the prosecution cannot bury something simply because it is inconvenient, and the test is not whether the evidence guarantees acquittal but whether it could realistically have changed the outcome. In a DUI, where cases often turn on narrow margins, a surprising amount of evidence meets that standard.

What that looks like in a DUI

  • Withheld officer credibility evidence. Failing to disclose that an officer is on a Brady list or has a history of dishonesty.
  • Suppressed testing problems. Not turning over maintenance, calibration, or accuracy records that show a breath machine was unreliable.
  • Missing video. Failing to preserve or disclose dash-cam or body-cam footage that contradicts the report.
  • Favorable witness information. Not disclosing a witness whose account undercuts the prosecution's version.

The special problem of lost or destroyed evidence

A recurring issue in DUI cases is evidence that is not so much withheld as allowed to disappear. Many agencies overwrite body-cam and dash-cam footage on a set retention schedule, and breath-machine logs and dispatch recordings can be lost if no one demands them in time. When potentially exculpatory evidence is destroyed, the law provides remedies that depend on whether the loss was in bad faith and how important the evidence was. This is one of the strongest reasons to get counsel involved early, so that preservation demands go out before the footage and records that could have helped you are gone for good.

Why it is so serious

When favorable evidence is withheld, the fairness of the entire proceeding is compromised. Depending on the circumstances, a Brady violation can lead to the exclusion of evidence, sanctions against the prosecution, a new trial, or dismissal of the charges. The remedy depends on how significant the suppressed evidence was and how it affected the case, but courts take these violations seriously because they go to the integrity of the process itself. A proven Brady violation is not a technicality; it is a finding that the state failed in its basic constitutional duty.

How I pursue it

I make specific, documented discovery demands and follow up on what should exist but has not been produced, the video, the testing records, the officer's background. When evidence that should have been disclosed is missing or surfaces late, I raise it with the court and seek the appropriate remedy. The key is precision: a vague request is easy to brush aside, while a detailed demand that names exactly what should exist creates a record the court can act on when it is not produced. This connects directly to the Pitchess motion for officer records and the broader issue of prosecutorial misconduct. See my top DUI defenses.

Why early, aggressive discovery matters

Brady issues reward lawyers who push hard and push early. The evidence that most often makes a difference, the footage, the calibration logs, the officer's record, is exactly the evidence that is easiest to lose or easiest to leave undisclosed if no one insists on it. By demanding everything I am entitled to at the outset and documenting each request, I put the prosecution on notice and create the record needed to seek a remedy later. A Brady violation is only useful to your defense if it is identified and raised, and that depends on knowing what should have been there in the first place.

The remedies a court can order

When a Brady violation is established, the court has a range of responses depending on the seriousness of the breach and how much the missing evidence mattered. In some cases the remedy is exclusion of related evidence or testimony; in others the court may give a jury instruction allowing the jury to draw an adverse inference from the loss; and in the most serious cases the proper remedy is a new trial or dismissal of the charges altogether. The point is that the law does not treat a failure to disclose as harmless. By tailoring the request to the gravity of the violation, I can ask the court for the remedy that actually fits what happened in your case.

Brady, Pitchess, and prosecutorial misconduct together

Brady issues rarely stand alone. They overlap with the Pitchess motion, which is how the defense reaches an officer's confidential personnel records, and with broader prosecutorial misconduct when the failure to disclose is part of a larger pattern. Used together, these tools let me probe for everything the prosecution should have turned over, from an officer's disciplinary history to the testing records the state would rather not produce. Treating them as a connected strategy, rather than isolated motions, is what makes a discovery-focused defense effective.

Think evidence was withheld in your case?

Whether a Brady issue exists depends on what should have been disclosed and was not, which is exactly what I investigate. Use the free case analysis on this page, or call me directly at (888) 271-6644. I answer my own phone, 24/7.