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You can decline roadside physical field sobriety exercises, but that is different from refusing a legally required chemical test. Minnesota’s criminal test-refusal law identifies qualifying breath, blood, and urine testing, not walking or balancing exercises. Declining an exercise does not guarantee that the investigation will end or that you will avoid arrest.

Which test is the officer requesting?

The NHTSA field sobriety training manual describes three standardized tests: horizontal gaze nystagmus (an eye-movement examination), walk-and-turn, and one-leg stand. These are distinct from a handheld preliminary breath test and an evidentiary chemical test.

Ask which test is being requested rather than assuming every roadside request follows the same rules. Clearly explain a physical limitation or medical concern. Do not physically resist an officer or assume declining an exercise permits you to leave.

Is a preliminary breath test the same as a field exercise?

No. Section 169A.41 authorizes an officer to require a preliminary breath sample when the statutory grounds exist. Its results primarily help determine whether to arrest and require further testing; the statute limits courtroom use but lists exceptions.

A preliminary-test refusal is not interchangeable with the chemical-test refusal offense. It can nevertheless matter: section 169A.51 lists refusal of preliminary screening as one condition permitting further testing when the officer also has probable cause.

Does implied consent apply only after arrest?

No. Section 169A.51 requires probable cause and a listed condition; lawful arrest is one condition, not the only one. Other listed conditions include a qualifying accident, preliminary-test refusal, or a preliminary result of .08 or more.

The breath-test advisory includes a limited opportunity to consult an attorney that cannot unreasonably delay testing. Blood and urine testing follows warrant requirements or a judicially recognized exception, together with the applicable statutory procedures. Do not assume the same attorney-consultation rule or advisory applies to every type of test.

When can refusal lead to a criminal charge?

Section 169A.20, subdivision 2, addresses refusal of qualifying breath tests and blood or urine tests required by a search warrant. The warrant-exception provisions of section 169A.51 and the actual testing procedure also require review.

For warrant-directed blood or urine testing, section 171.177 addresses the advisory and alternative-test requirements. A lawyer should examine the exact request, your response, the testing authority, and any inability to provide a sample. Refusal allegations and license actions deserve prompt attention.

Can police continue without field sobriety results?

Yes. A lawyer must review the full encounter, including driving observations, recordings, statements, testing, and the legal basis for the stop and arrest. Declining an exercise does not remove other evidence. Whether a particular statement or refusal can be used in court is an evidentiary question for the specific case, not a blanket guarantee either way.

What should an attorney review?

  • Which exercises or chemical tests were requested, in what order, and when.
  • The instructions and demonstrations, recorded performance, and the officer’s stated observations.
  • Any physical limitation you reported, the testing surface, lighting, footwear, and other relevant conditions.
  • The advisory, warrant, consultation opportunity, and any alternative test offered.
  • Your complaint, court date, and all license notices.

Preserve original recordings and documents. A possible testing problem does not automatically invalidate the evidence or require dismissal. This page does not recommend a universal refusal strategy.

Request a Minnesota DWI consultation

Learn about our Minneapolis DWI defense services or schedule your free consultation. A Director of Client Engagement (non-attorney) may gather intake information and coordinate next steps. An attorney provides legal advice and evaluates testing issues and deadlines.

This page states Minnesota law and is for general information, not legal advice.

Disclaimer: This content provides general information and should not be considered legal advice. For legal guidance specific to your situation, please contact Martine Law.

Xavier Martine
Xavier Martine
Founder and Lead Attorney
Attorney Xavier Martine is a criminal and family law attorney with a diverse background and strong professional insight. A St. Paul native and former Navy nuclear engineer, he upholds discipline and excellence. After graduating magna cum laude, he founded his firm in 2019. His law firm reflects his core values: integrity, compassion, and a strong resolve to serve.