Field Sobriety Tests in Bend, Oregon DUII Cases: What You Should Know

If you are stopped on suspicion of DUII in Bend, there is a good chance the officer will ask you to perform field sobriety tests.

These tests are often presented as routine and straightforward. In reality, they are highly subjective, influenced by many factors, and not always a reliable measure of impairment—especially in cases involving fatigue, anxiety, medical conditions, or non-alcohol substances.

Understanding how these tests work—and their limitations—can help you make more informed decisions if you find yourself in that situation.

What Are Field Sobriety Tests?

Field sobriety tests are a series of physical and cognitive exercises used by law enforcement to assess whether a driver may be impaired.

Common tests include:

• Horizontal Gaze Nystagmus (eye movement test)
• Walk-and-Turn (heel-to-toe steps in a straight line)
• One-Leg Stand

Officers are trained to look for specific “clues” during these tests. However, what gets labeled as a “clue” is often open to interpretation.

Why Field Sobriety Tests Are Not Always Fair

These tests are not conducted in a controlled environment. They often take place:

• On uneven or poorly lit roads
• Late at night
• In stressful conditions

That matters.

Performance on these tests can be affected by:

• Nervousness or anxiety
• Fatigue
• Injuries or physical limitations
• Age or balance issues
• Weather or road conditions

Even completely sober individuals can struggle under these circumstances.

Despite this, the results are often used to justify an arrest.

Subjectivity Plays a Major Role

Unlike a breath test, field sobriety tests rely heavily on the officer’s interpretation.

Two different officers observing the same performance may reach different conclusions. Subtle movements, hesitation, or perceived lack of coordination can all be interpreted as signs of impairment.

This subjectivity becomes especially important when the case is later reviewed—because what was “obvious impairment” at the roadside may look far less clear when examined more closely.

The Fourth Amendment Still Applies During a DUII Stop

The Fourth Amendment protects against unreasonable searches and seizures, and that protection continues to apply during a DUII investigation.

The Stop Must Be Justified

An officer must have reasonable suspicion to initiate a traffic stop. Without it, the entire case can be called into question.

The Investigation Must Stay Within Legal Bounds

Once a stop is made, the officer can investigate—but not without limits.

If the officer:

• Extends the stop without a valid reason
• Escalates the encounter without sufficient cause
• Or pressures a driver into actions beyond what the law allows

those issues can become central to a DUII defense.

Field sobriety tests often sit right at the edge of this line.

They are commonly requested—but how and when they are introduced, and whether the officer had a lawful basis to continue the investigation, can matter more than most people realize.

Should You Refuse Field Sobriety Tests?

This is where things get complicated.

In Oregon, field sobriety tests are generally considered voluntary. That means you can refuse them.

However, refusal is not a simple decision.

Choosing not to participate may:

• Limit the evidence available to the officer
• But also raise suspicion or be noted in reports

On the other hand, agreeing to the tests may:

• Provide the officer with additional observations
• That can later be used to support an arrest

There is no one-size-fits-all answer.

The right decision depends on the situation, and it is something that is best evaluated after the fact, with a clear understanding of what actually happened during the stop.

What Happens After the Tests?

If an officer believes there are enough signs of impairment, you may be arrested and asked to submit to chemical testing (breath or blood).

At that point, different rules apply—including Oregon’s implied consent law, which carries its own consequences for refusal.

Again, the details matter.