The CAD log says 21:14. The bodycam says 21:31. The report skips the gap. Seventeen minutes the narrative never explains. In a criminal case, a gap like that can decide a suppression motion.
Finding it depends on two things: asking for the right material early, and comparing it once it arrives. Discovery does not compare itself.
This criminal defense discovery checklist covers what to request, the rules behind each request, and what to check each item against. Rules and deadlines differ by jurisdiction, so adapt it to your court. It is general information, not legal advice.
Put the police report, CAD log and bodycam transcript
on one timeline.
The legal basis for criminal defense discovery
Your requests rest on constitutional duties and court rules. In federal court:
- Brady v. Maryland (1963). The prosecution must disclose evidence favorable to the defense that is material to guilt or punishment.
- Giglio v. United States (1972). That duty covers evidence that affects a government witness’s credibility, such as promises or deals.
- Kyles v. Whitley (1995). The prosecutor is responsible for favorable evidence known to others acting for the government, including the police.
- FRCrP 16. On request, the government must disclose the defendant’s statements, prior record, documents and objects, reports of examinations and tests, and expert information.
- Jencks Act (18 U.S.C. § 3500) and FRCrP 26.2. A government witness’s statements must be produced after the witness testifies on direct.
- FRCrP 5(f). Since the Due Process Protections Act of 2020, federal judges issue a Brady order at the first appearance.
State courts have their own discovery rules and timelines, and many require a written request or a motion for discovery before anything is produced. Check your local rules and file early.
The checklist: what to request
| Done | Request | Why it matters | Compare it against |
|---|---|---|---|
| Police report and every supplemental report | The official narrative, often written hours or days later | CAD log, bodycam, witness statements | |
| CAD log and 911 audio | Dispatch times recorded as events happened | Report times, bodycam timestamps | |
| Bodycam and dashcam video, with metadata | What happened, and exactly when | Report narrative, CAD times | |
| Witness statements and interview recordings | First accounts, before stories settle | Later statements and testimony | |
| Search warrant, affidavit and return | The stated basis for the search | What officers knew at the time (CAD, reports) | |
| Lab reports, bench notes and chain of custody | Who handled the evidence, and when | Evidence log, property room records | |
| Phone extraction reports | What was taken from the device, and how | Warrant scope, report claims | |
| Breath or blood test records (DUI) | The result, the device and the operator | Stop time, observation period, calibration log | |
| Device calibration and maintenance logs (DUI) | Whether the instrument was working | Date and time of the test | |
| Recorded statements and jail calls of the client | What the State may use at trial | Report claims, other statements | |
| Officer disciplinary and credibility records | Impeachment material under Giglio | The officer's report and testimony | |
| Deals, promises or benefits for any witness | Credibility of cooperating witnesses | The witness's testimony |
Availability and timing depend on your jurisdiction. Some items need a specific request, a motion or a subpoena.
Ask early for recordings. Video, 911 audio and jail calls may be overwritten under an agency’s retention schedule. Send a preservation request with your first discovery request.
What to compare once discovery arrives
DUI-specific checks
- Stop time against test time. The breath or blood test should fall within the time limits your state sets.
- The observation period. Check that the record shows the observation period your state requires before a breath test, and who did the observing.
- Calibration and maintenance. Compare the device logs with the date of the test.
- Field sobriety tests on video. Compare the report’s description with what the camera shows.
The right frame: A discovery checklist only helps when every item is compared, not just collected. The case is usually in the gap between two sources that were never read side by side.
Where AI fits in criminal defense discovery
AI is useful for the first pass: reading every report, transcript and log, putting events on one timeline, and flagging where the sources disagree. It does not replace watching the video yourself or deciding strategy.
General AI chatbots can produce facts and citations that do not exist, and uploading client material to them raises confidentiality questions under Model Rule 1.6. If a tool cannot show you the page behind each fact, it is not ready for a suppression motion.
- AI can read the full discovery set, build the timeline, and flag conflicts between the report, the CAD log and the bodycam transcript, with a link to each source.
- AI cannot judge a witness, decide which conflict to use, or replace reviewing the recordings yourself.
NexLaw for criminal defense discovery
Upload reports, logs and transcripts. Every event goes onto one chronology, linked to its source document.
Pull out people, times and key facts from police reports and lab records, each linked to its page.
Compare testimony and prior statements with the reports, and see where an account changes.
Contradictions, risks and cross-examination outlines, with the evidence quoted.
Find the gap before the hearing
Book a 15-minute demo. We run NexLaw on a sample criminal file, and you check every result against its source.
