You are not required to answer potentially incriminating questions. Politely say, “I would like to speak with an attorney before I answer any questions.” This is an appropriate reply, although you are not entitled to counsel during a roadside stop unless you are in custody and questioned. Saying that you had one or two beers is not incriminating, is not sufficient to cause intoxication, and may explain the odor of alcohol on the breath.
Are field sobriety tests mandatory in Wisconsin?
For most drivers, no—roadside field sobriety tests (FSTs) are voluntary in Wisconsin. You may politely refuse without adding an extra penalty, though refusal often leads to immediate arrest so the officer can seek more reliable chemical evidence. The only major exception is for commercial driver's license (CDL) holders, who must comply when lawfully asked.
What counts as a “field sobriety test”?
Officers usually employ three standardized coordination exams—the Horizontal-Gaze Nystagmus, Walk-and-Turn, and One-Leg Stand—plus an optional roadside preliminary breath test (PBT). These tools are observational and subjective; they are not the same as post-arrest chemical tests.
Am I legally required to perform them?
No. Wisconsin statutes impose no duty on ordinary drivers to submit to FSTs. You may refuse. However, an officer can still arrest you if other indicators (driving behavior, odor of alcohol, admissions) create probable cause.
Why do police ask for FSTs if they’re optional?
They are quick, roadside screening tools that help an officer establish probable cause for an OWI arrest and document cues of impairment the state can later cite in court.
What happens if I refuse an FST in Wisconsin?
Expect to be arrested and taken for an evidentiary breath, blood, or urine test. The refusal itself can be mentioned in court to explain why the officer believed you were impaired, but it does not carry an automatic license suspension (unless you hold a CDL).
How are FSTs different from “chemical tests” under Wisconsin’s implied-consent law?
Roadside FSTs are discretionary. By contrast, once you’re arrested the implied-consent statute (§ 343.305) requires you to give a chemical sample. Declining that post-arrest test triggers administrative penalties—usually an immediate license revocation—even if you previously refused FSTs.
Are the rules stricter for commercial drivers?
Yes. Holding a CDL means you have already agreed to perform both FSTs and PBTs when an officer has lawful grounds to request them, even while driving your personal car. Refusal jeopardizes both your CDL and non-commercial privileges.
Can passing the FSTs prevent arrest?
Not necessarily. Even a “clean” performance doesn’t stop the officer from requesting a PBT or arresting you if other clues point to impairment. Courts have upheld arrests where drivers passed FSTs but still showed probable-cause cues.
Could refusing hurt my defense later?
Generally, refusing may limit the subjective evidence the state can present against you, giving your attorney more room to challenge the case. But prosecutors can mention the refusal, and jurors may infer you had something to hide. Weigh the trade-offs and, if possible, call a lawyer from the roadside.
What should I say if I decide to refuse?
Stay calm and respectful:
“Officer, on the advice of counsel, I respectfully decline to perform any field sobriety tests.”
Do not argue, volunteer explanations, or perform partial tests. Silence beyond providing your license and proof of insurance is usually safest.
When should I contact an attorney?
Immediately. OWI cases move quickly, and early intervention can protect both your license and your record. Stangl Law offers free ten-minute consultations—call as soon as you’re cited or arrested.
Get a Free Legal Consultation
If you’re facing an OWI charge, a knowledgeable attorney can help explore potential defenses. For a no-cost, 10-minute consultation with Madison-based OWI attorney Patrick Stangl, contact Stangl Law Offices to discuss your case and options for achieving the best possible outcome.
Madison OWI Attorney Patrick J. Stangl, is committed to exploring options for your best defense and has defended clients across the state since 1991. To this end, he is pleased to offer a FREE 10-minute consultation at no obligation to discuss the specifics of your case and take the first step in putting this stressful time behind you.
Being charged with a crime in Wisconsin can be an intimidating, scary, and ultimately life-changing event. If you hire Attorney Stangl to defend your criminal case, he can:
- Review the case for defects
- Potentially move for the suppression of evidence
- Compel the discovery of evidence to support your innocence
Fill out the form to request your FREE 10-minute consultation at no obligation right away.
Real Case Success: Attorney Stangl’s Consecutive OWI Victories
Attorney Patrick Stangl recently achieved three consecutive OWI dismissals in a single month by effectively challenging probable cause and procedural missteps in each case. For instance, in one case, he successfully argued against a prior conviction that had not honored his client’s right to counsel. In another, he demonstrated that the arresting officer lacked sufficient reason for the arrest, leading the court to dismiss the charges.

Attorney Patrick Stangl
Nationally recognized for excellence, Wisconsin Criminal Defense Attorney Patrick J. Stangl has been practicing law in the Badger State since 1991. While his expertise spans the breadth of criminal law, Attorney Stangl is well-known for his impressive record as a Wisconsin OWI attorney, defending all types of drunk driving and driving under the influence charges such as OWI, DUI, DWI, BAC, PAC, and more.