You can walk into a licensed dispensary in Bellevue, purchase cannabis legally, and consume it in the privacy of your home without breaking any law. But the moment you get behind the wheel—hours later, the next morning, possibly even days afterward—you risk a DUI arrest based on THC that remains detectable in your blood long after any impairing effects have faded.
Washington’s cannabis DUI law creates a trap for legal users. The 5 ng/mL blood threshold treats everyone the same, ignoring that regular consumers metabolize THC differently than occasional users. A patient who takes cannabis for chronic pain may walk around with THC levels above the legal limit while experiencing zero impairment. Someone who shared a joint at a party three nights ago might still test positive. The law doesn’t distinguish between active intoxication and residual chemistry.
Eastside DUI has defended cannabis DUI cases in King County since before recreational legalization. Our attorneys—Roberto Yranela, Matthew Skau, and Robin Tu—recognized early that these cases require different strategies than alcohol DUI. The science is more contested. The testing is less reliable. And the assumptions prosecutors make are far easier to challenge. A Bellevue, WA DUI lawyer from our team can evaluate whether the evidence against you actually proves impairment—or just proves you’ve used a legal substance sometime in the recent past.
Contact us for a free consultation.
Why Choose Eastside DUI For Cannabis DUI Defense In Bellevue, WA?
We Recognized the Flaws Before Most Attorneys Did
When Washington set the 5 ng/mL threshold in 2012, most attorneys assumed it would work like the alcohol limit—a reliable marker of impairment backed by solid research. We knew better. The scientific literature on THC and driving impairment was thin, contradictory, and nothing like the robust data supporting alcohol limits. That skepticism has only been validated over time, as study after study has failed to establish meaningful correlation between specific THC blood levels and actual driving ability.
A Bellevue cannabis DUI attorney who has tracked this evolving science brings depth to your defense that attorneys treating cannabis cases as alcohol-DUI-with-a-different-chemical cannot match.
Roberto Yranela began handling cannabis DUI cases when legalization first created this new category of prosecution. Over the years, he’s assembled the scientific resources, expert contacts, and legal arguments that expose the weakness in THC impairment evidence. His undergraduate education at the University of Washington trained him in rigorous analysis. His J.D. from Valparaiso University School of Law taught him how to present complex evidence persuasively. Fifteen years of practice applying both has built the experience your case needs.
Recognized for DUI Defense Excellence
Super Lawyers recognized Roberto Yranela as Top 40 Under 40 for DUI defense. The National Trial Lawyers included him in their Top 40 Under 40. Avvo honored him with Client’s Choice distinction. When you need a DUI attorney in Bellevue who understands why cannabis cases differ fundamentally from alcohol cases, our credentials reflect that specialized experience.
The Prosecution’s Assumptions Are Their Weakness
Prosecutors walk into cannabis DUI cases assuming the blood test proves impairment. That assumption collapses under scientific scrutiny. We exploit the gap between what THC levels actually indicate and what the prosecution needs to prove.
What Our Clients Say
⭐⭐⭐⭐⭐ “Roberto was amazing throughout the entire process. He communicated clearly, responded quickly, and always made sure I understood what was happening. Thanks to his support, my case was resolved smoothly and better than I expected. He handled everything with professionalism and care. I would definitely recommend him to anyone looking for reliable legal help!” – David Woo
Types Of Cannabis DUI Cases We Handle In Bellevue
Cannabis DUI prosecutions take various forms depending on the evidence available and the prosecution’s theory. Our DUI defense attorneys handle every variation.
- Per se THC cases. When blood testing shows THC at or above 5 ng/mL, prosecutors pursue per se charges—arguing the number alone proves guilt. A Bellevue DUI lawyer challenges the scientific validity of the threshold itself and whether the detected level actually reflected your condition while driving.
- Impairment-based cannabis cases. Sometimes prosecutors proceed on impairment theories without relying on specific THC levels—using officer observations, driving behavior, and Drug Recognition Expert evaluations. These cases depend entirely on subjective evidence vulnerable to challenge.
- Edible cannabis cases. Edibles metabolize differently than smoked or vaped cannabis, producing delayed onset and prolonged detection windows. The timing between consumption and blood draw becomes especially significant. Challenging breathalyzer results doesn’t apply to cannabis cases, but similar principles about testing reliability and timing do.
- Medical cannabis authorization cases. Patients with valid medical cannabis authorizations face prosecution under the same standards as recreational users. However, documented medical use supports tolerance-based defenses and establishes legitimate reasons for elevated baseline THC levels.
- Cannabis combined with alcohol. When prosecutors allege impairment from both substances, they sometimes use cannabis presence to bolster weak alcohol evidence—or vice versa. We analyze whether either substance actually caused impairment or whether the combination theory masks evidentiary weakness.
- Cannabis DUI causing injury. Accident cases with injury allegations carry higher stakes and more aggressive prosecution. Knowing your rights after arrest becomes critical when facing potential felony charges, but the fundamental challenge—proving cannabis actually impaired your driving—remains.
Washington Legal Requirements For Cannabis DUI
Washington treats cannabis DUI seriously despite the contested science underlying its legal framework. Understanding these requirements reveals both the prosecution’s tools and their limitations.
Under RCW 46.61.502, a person commits DUI if they drive with a THC concentration of 5.00 ng/mL or higher within two hours of driving. This per se standard mirrors the 0.08% BAC threshold for alcohol—but lacks the decades of research correlating alcohol levels to impairment. The legislature chose 5 ng/mL through political negotiation, not scientific determination.
Alternatively, the prosecution can pursue cannabis DUI based on actual impairment regardless of THC level. Officers observe driving patterns, conduct field evaluations, and form opinions about impairment. A DUI lawyer in Bellevue challenges both the observations themselves and the conclusions officers draw from them.
Drug Recognition Expert evaluations play a significant role in cannabis DUI cases. The International Association of Chiefs of Police developed the DRE protocol, which Washington officers use to assess suspected drug impairment. The twelve-step evaluation includes pupil measurements, vital signs, muscle tone assessment, and divided attention tests. These evaluations carry an air of scientific authority—but rely heavily on officer subjectivity.
Penalties for cannabis DUI follow RCW 46.61.5055, matching alcohol DUI consequences: mandatory jail time, fines, license suspension, and ignition interlock requirements. The Washington Department of Licensing handles administrative suspension independently from the criminal case. A Bellevue DUI attorney manages both proceedings with coordinated strategy.
Defending Cannabis DUI Charges In Bellevue
A Bellevue cannabis DUI lawyer builds defense around the fundamental weaknesses in cannabis impairment evidence:
- Exposing the threshold’s scientific emptiness. The 5 ng/mL standard wasn’t derived from impairment research. Studies consistently show that THC blood concentration fails to predict driving impairment reliably. Individual responses vary enormously based on tolerance, metabolism, and consumption method. We present expert testimony and peer-reviewed research demonstrating that the number prosecutors rely on proves nothing about your actual condition.
- Demonstrating the tolerance factor. Regular cannabis users develop tolerance that allows normal functioning at THC levels that would impair naive users. Your consumption history—documented through medical records, dispensary purchases, or personal testimony—supports the argument that your detected level didn’t produce impairment. Our drunk driving defense team adapts traditional DUI defense strategies to address cannabis-specific tolerance issues.
- Attacking the blood draw timing. THC levels drop rapidly after consumption, but the decline doesn’t track impairment duration. By the time officers obtain a warrant, transport you for blood draw, and complete the collection, significant time has passed. The result reflects a different moment than when you were actually driving—potentially a moment when THC was higher than during actual vehicle operation.
- Challenging DRE evaluation reliability. Drug Recognition Experts follow protocols, but those protocols involve substantial interpretation. What one DRE calls “impairment” another might view as normal variation. We examine the evaluating officer’s training, experience, and track record. We compare documented observations against video evidence. Knowing what to avoid saying during your stop matters, but what the DRE claims to have observed matters equally.
- Questioning blood testing procedures. Cannabis blood testing requires proper collection, preservation, storage, and analysis. Degradation occurs if samples aren’t handled correctly. Laboratory protocols must be followed precisely. We obtain chain of custody documentation and laboratory records, examining each step for errors that compromise result reliability.
- Presenting the absence of driving impairment. Dash cam and body cam footage often show driving and demeanor inconsistent with actual impairment. Someone truly impaired by cannabis would exhibit obvious signs—not the composed, responsive behavior many defendants display on video. Working with a DUI defense attorney who knows how to use video evidence effectively can transform the prosecution’s assumptions into reasonable doubt.
Contact Eastside DUI
Cannabis DUI prosecutions rest on science that doesn’t support the conclusions prosecutors want juries to draw. The threshold is arbitrary. The testing captures history rather than current condition. The correlation between THC levels and actual impairment remains unproven. Our Bellevue cannabis DUI lawyers have spent 15 years building defenses around these realities—challenging blood evidence, attacking DRE evaluations, and showing juries why cannabis detection doesn’t equal cannabis impairment.
We offer free consultations to analyze your case and identify the strongest defense approaches. DUI defense fees start at $3,500, and we discuss costs transparently before you make any commitments.
A legal substance shouldn’t produce automatic conviction. Contact Eastside DUI today.
