How to Request Discovery in a Criminal Case | Be My Own Attorney
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How-To Guide

How to Request Discovery in a Criminal Case

You have the right to see the evidence the prosecution plans to use against you — and much more than that. This is how discovery works, what you're entitled to receive, how to ask for it, and what happens when the government doesn't comply.

11 min read | Updated June 2026

What Discovery Is

Discovery is the process by which you obtain the evidence, documents, and information that the prosecution has — before trial. In criminal cases, the prosecution holds most of the evidence: police reports, lab results, witness statements, surveillance footage, prior criminal records, expert reports. Discovery gives you access to that material so you can prepare your defense.

Discovery rights in criminal cases come from two sources: constitutional guarantees and procedural rules. The constitutional floor is set by Brady v. Maryland and its progeny. State and federal procedural rules build on top of that and typically require broader disclosure.

As a pro se defendant, you have the same discovery rights as a represented defendant. Courts cannot give you less because you don't have a lawyer. What you won't have is an attorney who automatically requests discovery and chases down non-compliance — you have to do that yourself.

What You're Entitled To

Brady Material — The Constitutional Floor

Under Brady v. Maryland (1963), the prosecution must disclose all evidence that is "material" to guilt or punishment and favorable to the defendant — even if you don't ask for it. This includes both exculpatory evidence (tending to show innocence) and impeachment evidence (tending to undermine witness credibility). Failure to disclose Brady material is a constitutional violation. The obligation is ongoing — it continues through trial and even after conviction if new material surfaces.

Giglio Material — Witness Impeachment

Giglio v. United States extended Brady to witness credibility. The prosecution must disclose any agreements or benefits given to prosecution witnesses in exchange for their testimony, as well as prior misconduct or perjury by those witnesses. For police witnesses specifically, this includes sustained complaints for dishonesty, prior false reports, and any prior judicial findings that the officer was not credible.

Rule-Based Discovery — Beyond the Constitutional Minimum

Federal Rule of Criminal Procedure 16 and its state equivalents require broader disclosure than Brady alone. Under Rule 16 and comparable state rules, the prosecution must disclose: the defendant's prior statements, the defendant's criminal record, documents and tangible objects the government intends to use at trial, reports of examinations and tests, and expert witness summaries. Many states have even broader "open file" discovery policies. Check your state's criminal procedure rules for the specific requirements.

The Full Discovery Checklist

Request everything in this list, in writing, from the prosecution. Don't assume you'll automatically receive something just because you're entitled to it:

Police Records
  • All police reports (incident, supplemental, arrest)
  • Body camera footage
  • Dash camera footage
  • CAD/dispatch records and audio
  • Evidence collection logs and chain of custody
  • Officer notes and field interview cards
Witness Information
  • Names and addresses of all prosecution witnesses
  • Written or recorded witness statements
  • Any deals, benefits, or promises made to witnesses
  • Prior convictions or misconduct of witnesses
  • Any prior inconsistent statements by witnesses
Physical Evidence & Lab
  • Lab reports (drug tests, DNA, ballistics)
  • Lab accreditation and analyst qualifications
  • Breathalyzer calibration and maintenance records
  • Any physical evidence the prosecution intends to use
  • Photographs of crime scene or evidence
Your Own Records
  • Your prior statements to police
  • Your prior criminal record
  • Any wiretap or surveillance records involving you
  • Search warrant and supporting affidavit
  • Grand jury transcripts (where available)
Experts & Officers
  • Expert witness identities and CV
  • Expert reports and conclusions
  • Officer disciplinary history (Giglio)
  • Officer training records relevant to procedures used
  • Departmental policies applicable to your stop or search
Exculpatory Material
  • Any evidence inconsistent with guilt
  • Witnesses who gave statements favorable to you
  • Investigations that were discontinued or inconclusive
  • Alternative suspect information
  • Anything the prosecution believes is Brady material

How to Make the Request

Discovery requests must be made in writing — never rely on a verbal request. Some jurisdictions have standardized discovery request forms; check your court's local rules. Where no form is required, write a formal letter or motion titled something like "Defendant's Request for Discovery and Disclosure."

What the Request Should Include

1.

Your name, case number, and the court it's filed in

2.

Citation to the applicable rule (Federal Rule 16, or your state equivalent) and to Brady and Giglio by name

3.

A specific, itemized list of what you are requesting — don't just say "all discovery." Itemized requests are harder to deny and easier to enforce

4.

A response deadline — typically 14–21 days, or whatever your court's local rules require

5.

Certificate of service confirming you sent a copy to the prosecution

File the request with the court clerk and serve a copy on the prosecutor. Keep your own file-stamped copy. In many jurisdictions, your discovery request is not a motion — you simply send it to the prosecution and file it with the court. In others, you must file a formal motion and set it for hearing. Check your local rules.

When the Prosecution Doesn't Comply

Non-compliance is common. Prosecutors have heavy caseloads, and discovery responses are often incomplete on the first round. Here's the escalation path:

1
Follow up in writing.

Send a letter identifying what you requested, what you received, and what is still outstanding. Give a new deadline. Put it in writing so there's a record.

2
File a motion to compel discovery.

A motion to compel asks the court to order the prosecution to produce the materials you requested. Attach your original discovery request, any follow-up correspondence, and document what remains unproduced. Courts take compliance with discovery orders seriously.

3
Request sanctions or continuance.

If the court has ordered production and the prosecution still fails to comply, ask for sanctions: suppression of the undisclosed evidence, dismissal in egregious cases, or at minimum a continuance to give you time to review late-produced materials. Courts rarely dismiss cases outright but will suppress evidence that was improperly withheld.

4
Build a Brady record for appeal.

If you discover after conviction that the prosecution withheld material Brady evidence, that is grounds for a new trial or appeal. Document every request you made and every instance of non-disclosure throughout the case — this record is what you'll rely on in a post-conviction Brady claim.

Once you have discovery, use Brief. Brief is designed for exactly this moment — upload your police report, lab reports, witness statements, and other discovery materials. Brief reads them together, identifies inconsistencies, flags the evidence most relevant to your defense, and shows you what questions your discovery raises so you know what to chase down next.

Make Sense of What You Received

Brief Reads Your Discovery and Tells You What Matters

Upload your police report, lab results, witness statements, and other discovery documents. Brief identifies the key facts, flags inconsistencies between documents, and shows you what your discovery package is still missing.

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Common Questions

Discovery FAQ

Yes, under Brady. The prosecution's obligation to disclose exculpatory and impeachment material is automatic — it exists regardless of whether you ask. However, relying on the prosecution to self-identify Brady material without a request is risky. Prosecutors sometimes fail to recognize what is exculpatory. A specific written request that identifies what you want creates a record that supports a Brady violation claim if material is later found to have been withheld.
No. Your discovery rights are the same whether you have an attorney or not. A prosecutor who refuses to provide discovery to a pro se defendant because they're self-represented is violating those rights. If this happens, file a motion to compel and specifically note that the refusal was based on your pro se status. Courts take this seriously.
Request it anyway and document the response. If body camera footage existed and was required to be preserved under department policy but wasn't, that failure may support a due process argument. Under Arizona v. Youngblood, negligent destruction of potentially exculpatory evidence requires a showing of bad faith for suppression. However, bad faith destruction can support a missing evidence instruction to the jury — the court tells the jury it may draw an adverse inference from the missing evidence.
It depends on your jurisdiction. Federal Rule 16 and many state rules require reciprocal discovery — if you demand discovery from the prosecution, you must also disclose certain materials to the prosecution: documents and tangible objects you plan to introduce, expert reports, and your witnesses' identities (in some jurisdictions). Failure to comply with reciprocal discovery can result in exclusion of your evidence at trial. Know your jurisdiction's reciprocal discovery requirements before you demand discovery.
As early as possible — ideally at or shortly after arraignment. Discovery takes time to produce, review, and act on. If you receive lab results three days before trial, you may not have time to retain an expert to challenge them. Early requests give you more time to use what you receive. File your discovery request immediately after you invoke your right to self-representation.