Being charged with a DUI in Oregon can feel overwhelming, but a charge is not the same thing as a conviction. Oregon law gives people facing a DUI charge more than one way to challenge the case, and understanding those options is the first step toward a stronger outcome. Below, we walk through some of the most common approaches used to defend against a DUI charge, from questioning the legality of the traffic stop to examining how breath and blood tests were administered.
Challenging the Legality of the Stop
Before an officer can pull a driver over, Oregon law requires that the officer have a valid legal basis for the stop. In a traffic context, that generally means the officer must have probable cause that a traffic violation occurred, or reasonable suspicion that a crime has been committed. A hunch is not enough. Officers must be able to point to specific facts that explain why they made contact with a driver in the first place.
When that legal basis is missing, an attorney can file a motion to suppress, asking the court to exclude everything that happened after the unlawful stop. Because so much of the evidence in a DUI case, including field sobriety tests and breath test results, is collected after the initial stop, a successful motion to suppress can remove the evidence a prosecutor needs to move forward. In some cases, this results in the case being dismissed altogether.
Questioning Breath and Blood Test Results
Breath and blood tests are treated as scientific evidence, but the process behind them is far from foolproof. Officers are required to follow a specific, technical sequence when administering a breath test, and any deviation from that sequence can call the entire result into question. If the equipment was not properly calibrated, if the officer did not observe the required waiting period, or if any other step in the process was skipped or performed incorrectly, the test result may not hold up.
An experienced defense team will review the full record of how a breath or blood test was administered, not just the final number reported. When the process was not followed correctly, that becomes a central part of the defense, and it is often something a jury has never had explained to them before.
Medical Conditions That Can Affect a Breath Test
Not every elevated breath test result reflects the amount of alcohol a person actually consumed. Certain medical conditions can cause alcohol to move from the stomach up through the esophagus, artificially raising what a breath test detects compared to what is actually present in a person’s bloodstream from normal absorption. These conditions are specific and limited, but when they apply, they can be an important piece of a defense.
Part of preparing a strong defense includes reviewing a client’s full medical history to determine whether any condition may have contributed to an unusually high reading. This is not about denying that impairment occurred. It is about making sure the evidence used against a person accurately reflects what happened.
Taking Your Case to a Jury
Every person charged with a misdemeanor DUI in Oregon has the option of a trial by jury. In Oregon, a misdemeanor jury consists of six people, and all six must agree in order to reach a guilty or not guilty verdict. Unlike an officer, a prosecutor, or even a judge who may have seen similar cases many times before, a jury is hearing the facts of a particular case for the first time.
That fresh perspective matters. A jury is asked to decide whether the evidence proves guilt beyond a reasonable doubt, and reasonable doubt simply means there is not enough certainty to convict. When a defense raises real questions about how a stop was conducted, how a test was administered, or what a medical condition may explain, it gives a jury a legitimate basis to decide that the state has not met its burden.
Why the Details of Your Stop Matter So Much
Many people assume that once an officer decides to make an arrest, the outcome of a DUI case is already settled. In practice, the opposite is often true. A DUI case is built from a long chain of individual decisions and observations, starting with the moment an officer first notices a vehicle and continuing through every question asked, every test administered, and every note written in a report. A weakness at any point in that chain can change the entire trajectory of a case.
This is why a thorough defense starts with a careful review of the record, not just the final charge. Dashcam footage, bodycam footage, dispatch logs, and an officer’s own written report can all reveal inconsistencies that are not obvious from the charge alone. Sometimes those inconsistencies point toward a stronger defense than a person realized they had.
Building the Right Defense for Your Case
Every DUI case in Oregon is different, and the right defense depends on the specific facts involved, from the reason for the stop to the equipment used for testing to a person’s individual medical history. We represent good people facing DUI charges, and we take the time to understand every detail of a case before deciding which path offers the best chance at a favorable outcome.
For some clients, that means preparing to take a case in front of a jury. For others, it means negotiating with the state before a case ever reaches trial. Because every situation is different, there is no single approach that works for every person, which is exactly why a thorough, individualized review of the facts is the starting point for every case we take on.
We can negotiate the most favorable outcome possible for your case, in order to minimize the negative consequences on you and your family. If you or someone you love is facing a DUI charge in Oregon, the sooner an attorney reviews the details of your case, the more options are likely to be available.
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