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San Francisco Marijuana DUI Lawyer
How a San Francisco Marijuana DUI Attorney Can Help
Getting arrested for a marijuana DUI in San Francisco can put your reputation, driving privileges, and even your freedom at risk. The legal landscape is unlike alcohol-related DUIs, as there is no measurable threshold that automatically means you were “under the influence.” Instead, you face a process where evidence is often subjective and open to challenge, but the consequences are severe.
Uncertainty over how cannabis affects driving, the science behind THC tests, and the standards police use can leave you feeling overwhelmed and vulnerable. Police field sobriety tests and blood testing for THC often fail to provide clear answers, and prosecutors may use any signs of cannabis use against you, even when you were not impaired at the time of driving.
At Geller Law, PC, we recognize what’s at stake in every marijuana DUI case. We rely on our knowledge of San Francisco’s legal system, courtroom tactics, and the evolving science behind cannabis impairment. When you work with us, you get representation designed to challenge questionable evidence and help you take control of your life after a marijuana DUI arrest.
What is a Marijuana DUI in California?
Under California law, a marijuana DUI means operating a vehicle while your mental or physical abilities are impaired by cannabis. Both recreational and medicinal use are legal, but driving while impaired by any drug, including marijuana, remains strictly prohibited under California Vehicle Code 23152(f). Unlike alcohol DUIs, which are based on a 0.08% blood alcohol threshold, marijuana DUIs are assessed through officer observations and chemical testing rather than a numeric “per se” level.
Officers and prosecutors try to determine impairment through a combination of:
- Field sobriety tests measuring coordination, balance, and reaction time
- Physical indicators such as bloodshot eyes, the odor of marijuana, or delayed responses
- Statements or admissions made at the scene
- Blood tests for Δ9-THC (the psychoactive compound in cannabis)
However, these methods produce unreliable results. THC can remain in your bloodstream well after its effects have worn off, and frequent users may test positive for THC without being impaired. As a result, prosecutors often rely on subjective evidence to build a marijuana DUI case, creating a gray area where law enforcement and juries must make decisions without clear-cut scientific proof.
The legalization of recreational cannabis through Proposition 64 has not changed the requirement that driving must not be impaired by marijuana. If you’re charged, it is not enough for prosecutors to show you used cannabis; they must show it affected your driving ability.
PRACTICE AREAS
How the Marijuana DUI Process Works in San Francisco
When you’re stopped for suspicion of driving under the influence of marijuana, the process can be intimidating from the very first moment. Understanding the legal steps and your rights in this situation is essential for protecting your future. The steps involve:
- Traffic Stop & Initial Observations: Officers may pull you over for minor traffic violations, erratic driving, or after receiving a report. They’re trained to look for signs of cannabis use, such as red eyes, slow response, the smell of marijuana, or admission of use.
- Field Sobriety Tests: You may be asked to perform field sobriety tests (FSTs). However, these were designed to detect alcohol impairment, not marijuana, and studies show they are unreliable indicators of cannabis influence.
- Drug Recognition Evaluation (DRE): In some cases, a Drug Recognition Expert may arrive to check for physical or behavioral signs of drug impairment. Their assessments are subjective and may not reflect your actual condition.
- Blood Testing for THC: If officers believe there is probable cause, you could be taken for a blood test under California’s implied consent law. Refusal often results in an automatic license suspension, regardless of the outcome.
Importantly, California’s Vehicle Code 23152(f) creates a specific offense for driving “under the influence of any drug,” and, unlike alcohol’s 0.08% BAC threshold, there is no per se THC limit. Prosecutors must show that your driving was impaired, not just that you used cannabis.
The prosecution typically builds the case using:
- Toxicology reports showing THC presence in your blood
- Officer testimony regarding observed impairment or driving behavior
- Dash or body camera footage
- Your statements or admissions, if any
Penalties for a marijuana DUI are severe. First offenses can bring:
- Fines between $390–$1,000 (tripled with penalty assessments)
- License suspension from six to ten months
- Mandatory drug education courses
- Up to six months jail time (for aggravated or repeat offenses)
If you’re arrested, you also face an immediate DMV administrative suspension, and you only have ten days to schedule a hearing to contest this action. Our team at Geller Law, PC, handles San Francisco DUI representation so you receive comprehensive support through every stage of your case.
How a San Francisco Marijuana DUI Lawyer Can Help You
Our approach is strategic and aggressive as we work to dismantle the prosecution’s case at every stage. Here’s how we defend you against marijuana DUI charges:
Challenging Evidence
THC Blood Test Results: Unlike alcohol, THC in the bloodstream does not correlate clearly with impairment. We attack the reliability of blood tests by examining:
- Whether blood was drawn and stored according to legal protocol
- Timestamp between arrest and blood testing which can distort results
- Potential contamination or chain of custody issues
- Qualifications and methodology of laboratory personnel
Field Sobriety Test Reliability: These tests were crafted for alcohol cases and frequently misidentify cannabis impairment. We highlight:
- The absence of scientific consensus supporting SFSTs for cannabis
- Physical or environmental factors that affect test results (anxiety, medical conditions, road conditions)
- The officer’s training level and the administration of each test
Legality of the Stop and Arrest: Every DUI investigation must comply with the Fourth Amendment. We investigate whether:
- The officer had reasonable suspicion to make the stop
- Your constitutional rights were respected
- The arrest was carried out according to established procedures
Strategic Negotiation
Our team does not stop at challenging evidence as we pursue outcomes that protect you from the harshest consequences:
- Negotiating for reduced charges, such as wet reckless or dry reckless
- Exploring diversion or alternative sentencing options for eligible clients
- Pushing for dismissal when evidence is procedurally flawed, unreliable, or insufficient
We always approach your defense based on the unique facts of your case. If you have legal or immigration concerns or your professional license could be affected, we tailor our representation to minimize collateral harm.
Comprehensive Representation
The stakes in a marijuana DUI stretch beyond the criminal courtroom. At Geller Law, PC, we:
- Represent you at the DMV hearing to contest the license suspension, protecting your ability to drive
- Handle every aspect of your defense, from investigation and expert witness consultation to negotiation and, if necessary, trial
- Maintain clear communication so you understand each stage, what to expect, and the impact on your life
- Utilize our knowledge of marijuana DUI law, recognizing differences in impairment for medical cannabis users, and handling scientific challenges to the state’s testing methods
Contact Geller Law, PC Today
Facing a marijuana DUI charge in San Francisco is a challenge that demands immediate, strategic action. The evolving science of cannabis impairment and the unique legal challenges involved mean the difference between conviction and protecting your future often lies in your choice of defense counsel.
At Geller Law, PC, we stand with clients at every stage, from the initial traffic stop to courtroom hearings and DMV defense. Our team is committed to building a tailored strategy that addresses the specific evidence in your case, exposes weaknesses in the state’s methodology, and fights hard to preserve your freedom, license, and reputation.
Don’t let uncertainty or delay increase your risks. Contact Geller Law, PC today to schedule a confidential consultation. We’ll review your case, discuss your options, and explain how we can help you push back against marijuana DUI charges in San Francisco.
