A Los Angeles DUI stop can become an investigation in seconds. An officer asks whether you have been drinking, directs you out of the vehicle, and then says, “I need you to perform a few tests.” Many people comply because the request sounds mandatory. But can I refuse field sobriety tests in California? In most adult DUI stops, yes. The decision may still have consequences, and it does not prevent an arrest.
Can I Refuse Field Sobriety Tests in California?
For most drivers, standard field sobriety tests are voluntary. These are the roadside exercises officers commonly use to look for claimed signs of impairment, including the walk-and-turn, one-leg stand, and horizontal gaze nystagmus test, often called the eye test.
You generally do not have to perform these exercises before an arrest. A calm response such as, “I do not wish to perform field sobriety tests,” is usually sufficient. Do not argue, make sudden movements, or physically resist an officer. Declining the tests is different from refusing a lawful order or refusing a required chemical test after arrest.
That distinction matters. California’s implied-consent law applies to chemical testing after a lawful DUI arrest, not to roadside coordination exercises. Under Vehicle Code section 23612, a person lawfully arrested for DUI is generally required to submit to a breath or blood test. Refusal of that test can create separate consequences and may be used by the prosecution.
A roadside field sobriety test is not the same thing as a post-arrest breath or blood test.
Why Field Sobriety Tests Can Be Misleading
Field sobriety tests are presented as measures of impairment, but they often measure far more than alcohol or drug effects. They require balance, coordination, divided attention, and the ability to understand and follow instructions under pressure. Those conditions are not easy to meet on the shoulder of a freeway, a sloped street, or outside a crowded North Hollywood bar at night.
Footwear, injuries, age, fatigue, anxiety, poor lighting, traffic noise, and uneven pavement can affect performance. A person with a knee injury may struggle to balance on one leg. Someone with an inner-ear condition may have trouble turning in a straight line. A nervous driver may start too early, misunderstand a direction, or count incorrectly.
The officer’s interpretation is also central. Unlike a chemical test that produces a numerical result, field sobriety evidence depends heavily on what the officer says they saw, how they administered the test, and whether any body-camera or dash-camera video supports that account.
At trial, the prosecution may argue that poor performance showed impairment. A defense lawyer may examine whether the officer gave standardized instructions, selected a safe testing area, considered physical limitations, or inaccurately recorded what occurred. Video can be especially important when an arrest report describes obvious impairment but the footage shows a person who was coherent, steady, and responsive.
Refusing Tests Does Not End the DUI Investigation
Declining field sobriety exercises does not mean the officer must let you drive away. Police can still rely on other observations to decide whether they believe probable cause exists for a DUI arrest.
Those observations may include driving behavior, the odor of alcohol, red or watery eyes, speech, admissions, an open container, statements from witnesses, or the officer’s description of your demeanor. Some of this evidence can be challenged. For example, red eyes may result from allergies or exhaustion, and the smell of alcohol does not establish a blood alcohol concentration or prove a person was driving while impaired.
The practical point is this: refusal may limit one category of subjective evidence, but it is not a guaranteed way to avoid arrest. If an officer already believes there is probable cause, the investigation can proceed to arrest and chemical testing.
Do not try to explain away every observation at the roadside. Statements made during a stop can become evidence. You should provide required identifying information and comply with lawful instructions, but you do not need to volunteer details about where you were, what you drank, or how much you consumed. If questioning becomes custodial, clearly invoke your right to remain silent and ask for a lawyer.
The Preliminary Alcohol Screening Test Is Different
Confusion often arises because officers may offer a handheld roadside breath device, commonly called a preliminary alcohol screening test or PAS test. For many drivers age 21 or older who are not on DUI probation, a PAS test before arrest is generally voluntary.
However, the rules can differ for drivers under 21 and for drivers on DUI probation. Those drivers may be subject to additional requirements, and declining a PAS test can create separate legal or administrative problems. Commercial drivers and people subject to particular court orders may also face distinct issues.
Do not assume that every breath test is optional simply because it occurs near the roadside. Ask whether you are under arrest and whether the officer is requesting a preliminary screening test or a chemical test under implied consent. The officer may not give legal advice, but the question can clarify the stage of the investigation.
Once you are lawfully arrested, the choice is no longer whether to take no test at all. The issue is usually breath or blood testing under California’s implied-consent statute. The consequences of refusing after arrest can include a driver’s license suspension or revocation, enhanced penalties if there is a DUI conviction, and evidence the prosecutor may try to use to suggest consciousness of guilt.
What to Say and What Not to Do at a DUI Stop
A roadside encounter is not the place to litigate the legality of a stop or persuade an officer that the arrest is unfair. Your goal is to avoid creating additional evidence or escalating the encounter.
If you choose not to perform field sobriety tests, be polite and direct. You can say: “I respectfully decline field sobriety tests. I would like to remain silent and speak with an attorney.” Do not lie about drinking, conceal evidence, flee, or interfere with the officer’s investigation.
You should also avoid treating a refusal as a script that solves the case. Police reports sometimes characterize a refusal as uncooperative behavior. That characterization can be addressed later, particularly if body-camera footage shows a respectful and calm response. But a hostile roadside exchange can give the prosecution more to work with than the tests themselves would have.
If you are arrested, pay close attention to whether the officer gives an implied-consent advisement and what chemical test is requested. The timing of the arrest, the basis for the stop, the administration of the test, and the handling of the sample can all become significant issues in a DUI defense.
How Refusal Can Affect a Los Angeles DUI Case
In a Los Angeles County DUI case, a field sobriety test refusal is not automatically favorable or unfavorable. It depends on the evidence as a whole.
A refusal can deprive the prosecution of claimed balance failures, missed heel-to-toe steps, or eye-test observations. That may matter where the chemical result is close to the legal limit, where the prosecution alleges drug impairment, or where the officer’s observations are otherwise thin.
On the other hand, the prosecutor may argue that the refusal showed a desire to avoid evidence. Whether that argument is permitted, persuasive, or vulnerable to challenge depends on the facts and the court’s rulings. The defense should examine the officer’s exact language, the driver’s response, body-camera video, dispatch records, and whether police incorrectly treated a voluntary test as mandatory.
An experienced defense review does not stop at the field sobriety tests. It looks at the initial reason for the stop, the duration of detention, probable cause for arrest, breath-machine records or blood testing, officer training, video evidence, and statements made before and after arrest. In appropriate cases, those issues can be raised through motions, cross-examination, negotiations, or trial preparation.
Take Action Before Your First Court Date
If you were arrested after declining field sobriety tests, write down what you remember while the details are fresh: where the stop occurred, the road conditions, what the officer said, any medical or physical limitations, whether cameras were present, and the tests or breath samples requested. Do not discuss the facts on social media or rely on friends’ assumptions about what you “had to do.”
A DUI arrest in Los Angeles can affect your license, employment, professional standing, and criminal record. Wegman & Levin APC handles DUI matters with close attention to the evidence and the procedure behind the arrest. For a confidential consultation in North Hollywood or Los Angeles, call (818) 495-8330 before your court date or DMV deadline passes.
