The hours after a DUII arrest are when evidence starts disappearing: a receipt gets thrown away, a witness forgets what they saw, or video footage is recorded over. This DUII evidence checklist is not about arguing your case with police or trying to explain it away. It is about preserving the facts your defense may need while you protect your license, your job, and your future.
In Oregon, the criminal charge and the DMV license suspension process are separate. The deadline to request a DMV hearing can be as short as 10 days from the notice you received. Do not wait to see what happens in court before you act.
First, Protect the Documents You Already Have
Put every piece of paper from the stop, arrest, jail release, towing company, or DMV into one place. Photograph each page as a backup. Details that look routine can later matter, including the time listed for the traffic stop, the officer’s stated reason for stopping you, the testing information, and the date of any suspension notice.
Keep your citation, release agreement, temporary driving permit if one was issued, implied-consent paperwork, tow documents, property inventory, and any court date notice. If your license was taken, do not assume you can keep driving because your court date is weeks away. Read the paperwork carefully and get legal advice quickly about your driving status.
Your phone can also contain useful evidence. Preserve it. Do not delete texts, call logs, location history, photos, social media posts, or recordings from the night in question. Some of those records may support your timeline. Others may create questions a lawyer needs to address. Either way, deleting information can make a difficult case worse.
Write Your Own Timeline Before Details Fade
As soon as you can, write a private, factual account of the entire event. Start well before you drove. Where were you? Who were you with? What did you eat and drink, and when? Did you take prescribed medication, over-the-counter medication, or cannabis? Were you tired, injured, sick, anxious, or dealing with a medical condition?
Then describe the stop in order. Include the road, weather, lighting, traffic, what the officer said was the reason for the stop, and what you said in response. Record approximate times if you know them. If you do not know, say so rather than guessing.
Be specific about the field sobriety tests. Were you on gravel, a slope, wet pavement, or a poorly lit shoulder? What shoes were you wearing? Did you tell the officer about a bad knee, back problem, balance issue, eye condition, or other limitation? These details do not automatically defeat a DUII charge, but they can affect how field test performance should be interpreted.
Also document whether you were read any warnings, asked to provide a breath sample, requested to speak with a lawyer, or taken for blood or urine testing. State what happened without trying to reach legal conclusions. A clear timeline gives your defense lawyer a starting point for checking the police account against recordings, reports, and test records.
DUII Evidence Checklist: What May Matter
The evidence in a DUII case is more than a breath-test number. A strong defense review looks at the full chain of events, from the first contact to the chemical test and beyond. Preserve information in these areas:
- The reason for the stop, including dash camera footage, dispatch information, 911 calls, and witness observations.
- Your driving pattern, road conditions, vehicle condition, and whether there was another explanation for a lane movement, speed change, or equipment issue.
- Body camera or jail video showing your speech, coordination, demeanor, statements, and treatment by officers.
- Field sobriety test conditions, instructions, physical limitations, footwear, weather, lighting, and surface conditions.
- Breath, blood, or urine testing records, including observation periods, instrument records, sample timing, lab procedures, and chain-of-custody documentation.
- Medical records or prescriptions that may explain symptoms the officer treated as signs of impairment.
- Receipts, bank records, ride-share records, phone data, and witnesses that can establish the timeline of your evening.
You do not need to collect all of this yourself. In fact, trying to contact police witnesses, a bar, or potential witnesses in the wrong way can create problems. Your job is to identify what exists, preserve what you lawfully possess, and tell your attorney where to look.
Video Evidence Can Be Critical, but It May Not Last
Police body camera and patrol-car video may show whether the officer had a lawful basis to expand the stop, how instructions were given, and whether the report accurately describes your appearance or performance. Video from a store, restaurant, apartment building, parking lot, or nearby home may also be relevant.
But video is not always favorable. It can capture statements or conduct that the state may use. That is why you should not post clips, discuss the incident online, or send recordings around to friends for opinions. Preserve the material and review it with counsel before deciding how it fits into the defense.
If you know of private video, write down the business name, address, camera location, and approximate time window. Many systems overwrite footage quickly. A lawyer can determine whether a preservation request or other formal action is appropriate.
Chemical Test Evidence Requires More Than the Result
A breath, blood, or urine result can be powerful evidence, but it is not the end of the analysis. The question is not only what result was reported. It is also whether procedures were followed and whether the test reliably answers the question in your case.
With breath testing, the review may include the timing of the test, the required observation period, mouth alcohol issues, machine operation, and records connected to the instrument. With blood or urine testing, collection methods, sample handling, laboratory procedures, and the meaning of the result may matter. A marijuana DUII allegation can raise additional issues because the presence of THC does not, by itself, neatly establish when impairment occurred.
Do not attempt to recreate a test, search for ways to alter results, or make admissions to “clear things up.” Save the facts and get case-specific advice. The state carries the burden of proving its case, and defense work often begins with careful scrutiny of procedures that are treated as automatic.
Do Not Overlook the DMV Hearing Deadline
For many Oregon drivers, the immediate threat is losing the ability to drive to work, school, medical appointments, or family responsibilities. The DMV suspension process moves on its own track from the criminal case. Missing the hearing-request deadline can mean giving up a chance to challenge the suspension and obtain evidence early.
The notice you received should be reviewed immediately. Deadlines and options depend on the type of allegation and the paperwork issued. A breath-test refusal, for example, can create different issues from a case involving a reported test result. Do not rely on what happened to a friend or what you read in a general online post.
A prompt request for a DMV hearing may create an opportunity to examine the officer under oath and obtain documents relevant to both the license case and the criminal defense. It does not guarantee that a suspension will be avoided, but delay can remove options before the defense has even started.
Be Careful With Witnesses and Statements
If someone was with you before the stop, write down their contact information and what they may have observed. A witness may be able to speak to your alcohol consumption, food intake, appearance, physical condition, or driving. Their value depends on what they actually know, not on whether they want to help.
Do not ask anyone to tailor a story, delete messages, or coordinate accounts. Do not send a detailed explanation of your arrest by text. Conversations and messages can be misunderstood, forwarded, or subpoenaed. Keep your communication limited and factual until you have spoken with a defense attorney.
What to Bring to a DUII Defense Consultation
Bring the papers you received, your written timeline, any videos or photos you already possess, medical information that may be relevant, and the names of possible witnesses. Be candid about alcohol, drugs, medication, prior DUII history, and any license issues. A lawyer cannot protect you from facts you leave out.
At the same time, one arrest report is not the complete case. The stop may be challenged. The field tests may be less reliable than they appear on paper. Testing procedures may deserve close review. Diversion may be an option for some first-time defendants, while others need a different strategy because of prior convictions, a refusal allegation, or felony-level exposure.
The best next step is simple: preserve the facts, do not make the case harder through rushed decisions, and get focused legal advice before a deadline closes a door.