Can I Be Charged With DUI for Marijuana in Fairfax County, Virginia?

 Posted on May 01, 2026 in Criminal Defense

If you have been charged with DUI for marijuana in Fairfax County, the question most people ask is whether that can actually happen. The answer is yes. Even though Virginia law has changed when it comes to marijuana possession, that does not mean a person can legally drive while impaired by marijuana. DUI law still applies when the Commonwealth claims that marijuana, cannabis products, alcohol, or some combination of substances affected your ability to drive safely. Our Fairfax County marijuana DUI defense lawyer can help with your case.

Is a Marijuana DUI Different from an Alcohol DUI?

A marijuana DUI is different from a typical alcohol DUI because there is usually no simple breath number that decides the case. In an alcohol case, the Commonwealth often focuses heavily on the breath test. In a marijuana case, the focus is usually more spread out. The officer may rely on driving behavior, odor, appearance, statements, field sobriety tests, blood testing, body camera footage, and sometimes drug impairment observations from additional roadside testing.

The Reason for the Traffic Stop 

The first place to look is the stop. Why were you pulled over in the first place? Officers may describe the driving as delayed, unusual, drifting, or inconsistent, but the video does not always match the report. If the driving looks normal or the reason for the stop is weak, that can change how the entire case is evaluated.

After that, the focus usually shifts to the officer’s observations. In marijuana DUI cases, reports often mention odor of marijuana, red eyes, slow responses, nervousness, or the presence of marijuana in the vehicle. The problem is that those observations do not automatically prove impairment. Red eyes can come from fatigue or allergies. Nervousness is common during a police stop. Odor may suggest marijuana is present, but it does not prove when someone used it or whether they were impaired while driving.

Virginia Law, the Smell of Marijuana, and Marijuana DUIs

That point is especially important because Virginia law limits how marijuana odor can be used. In many situations, odor alone cannot justify a stop, search, seizure, or warrant. That does not mean odor is irrelevant in every marijuana DUI case, but it does mean the officer needs more than just smell to build a reliable case.

Field Sobriety Tests

Field sobriety tests are also important, but drug related DUI cases can involve more than the standard alcohol tests. Officers who have received ARIDE training may offer additional non standardized tests when they suspect drug impairment. These can include things like lack of convergence, modified Romberg, pupil observations, and other tasks that are not the same as the standard walk and turn or one leg stand. These tests are often presented as meaningful, but they still depend heavily on training, instructions, conditions, and interpretation.

That is where these cases can start to break down. A person may be tired, anxious, confused, dealing with poor lighting, or standing on an uneven surface. In some cases, the officer may treat a normal physical response as suspicious. In others, the video may not support the conclusions written in the report. Just because an officer says a test showed drug impairment does not mean the court has to accept that conclusion without question.

Blood Testing

Blood testing can also create confusion. A positive marijuana result does not always answer the real question, which is whether the person was impaired at the time of driving. Marijuana can remain detectable after use, and the presence of THC or related substances does not always line up cleanly with impairment in the way people assume. That is why the timing, the driving behavior, the officer’s observations, and the video all matter.

Building a Strong DUI Marijuana Defense 

In a lot of Fairfax County marijuana DUI cases, the defense is not based on one issue alone. It is usually several issues together. The stop may be questionable, the observations may be overstated, the ARIDE related testing may be unclear, and the blood result may not prove impairment at the time of driving. When those things are examined together, the case can look very different than it does at first.

Even when a marijuana DUI case appears difficult or the evidence looks strong at first glance, the outcome is not predetermined. DUI cases often turn on how they are positioned and presented. With the right approach, it is possible to shift how the Commonwealth and the court view the situation. Over the course of handling DUI cases in Fairfax County and throughout Northern Virginia, we have consistently found ways to mitigate, reduce, and in some cases resolve matters far more favorably than clients initially expect. If you think your marijuana DUI case is a lost cause, that is exactly when a careful and strategic review becomes most important.

Contact an Experienced Weed DUI Defense Lawyer in Fairfax County, VA 

At the end of the day, the question is not just whether you can be charged with DUI for marijuana in Fairfax County. You can. The real question is whether the Commonwealth can prove that marijuana impaired your ability to drive safely at the time you were operating the vehicle. That answer only comes from looking closely at the stop, the video, the officer’s observations, the standard and non standardized roadside tests, the blood testing, and the full circumstances surrounding the charge.

Our firm represents clients facing marijuana DUI charges, alcohol DUI charges, and other serious traffic and criminal offenses in Fairfax County, Arlington County, Prince William County, Loudoun County, Stafford County, and across Northern Virginia. Every case is approached with a high level of preparation, strategic analysis, and attention to detail. Whether your case presents an opportunity for dismissal, reduction, or mitigation, we develop a defense strategy tailored to the specific facts and circumstances involved. This approach ensures that your defense is not only personalized to your specific set of circumstances, but also handled at the level of experience and judgment these cases demand. We treat our clients like family and approach every case with the same level of care and attention we would expect if we were in your shoes.

If you are looking for a top DUI lawyer in Fairfax County who is focused on delivering results, call us today. We will review the facts of your case, identify potential defenses and strategic opportunities, and determine whether we are the right fit to move forward together. Call Noorishad Law, P.C. at 703-542-4500 today for a free consultation.