A DUI stop in Orange County can become stressful very quickly once an officer asks you to step out of the car. Field sobriety tests may look official, but they are not the same as a lab result or a chemical test. A reputable criminal defense attorney can review how the tests were given, what the officer claimed to see, and whether the conditions made the results unreliable. Poor performance on these tests does not automatically mean a DUI conviction.
The Three Standardized Tests Used in California
California officers often use three field sobriety tests recognized by the National Highway Traffic Safety Administration. The Horizontal Gaze Nystagmus test asks the driver to follow an object with their eyes while the officer looks for involuntary jerking. The Walk-and-Turn test asks the driver to walk heel to toe, turn, and return while the officer watches for balance and instruction issues.
The One-Leg Stand test asks the driver to hold one foot off the ground while counting aloud. Officers look for swaying, hopping, using arms for balance, or putting the foot down too soon. These tests are supposed to be given under specific conditions, but roadside stops rarely happen in perfect settings.
Non-Standardized Tests Used in Orange County
Some officers use other exercises during DUI stops. These may include the finger-to-nose test, the Romberg balance test, counting backward, or reciting part of the alphabet. These tests are not standardized in the same way as the three main field sobriety tests.
Because they do not have the same testing structure, their value in court is often weaker. The officer’s instructions, the driver’s nerves, and the setting can affect how the performance looks. A defense should not accept these results without checking how the test was explained and recorded.
Do You Have to Take Field Sobriety Tests in California?
Field sobriety tests are voluntary in California. You may decline them before arrest, and that is different from refusing a chemical test after a lawful DUI arrest. Many drivers do not know the difference during the stop.
A post-arrest breath or blood test falls under California’s implied consent law, and refusal can bring license consequences. Field sobriety tests before arrest are different because they ask you to perform physical tasks on the roadside. If asked, you can state clearly that you do not want to perform those tests.
What Can Affect Test Results That Have Nothing to Do With Alcohol
Many sober people struggle with field sobriety tests. Back pain, knee injuries, balance problems, flat feet, age, fatigue, and inner ear conditions can all affect performance. A person with a medical issue may look unsteady even without alcohol impairment.
The roadside setting can make the tests harder. Uneven pavement, poor lighting, traffic noise, wind, and passing cars can affect balance and focus. Shoes can matter too, especially if the driver is wearing heels or footwear that makes standing or walking difficult.
Nervousness is another factor. Being stopped by police and watched closely can make someone shake, speak awkwardly, or misunderstand instructions. Those reactions can look bad in a report, even when they have nothing to do with intoxication.
How Field Sobriety Test Results Are Challenged in Court
The defense usually starts with the video. Dashcam and body camera footage can show whether the officer explained the tests properly, demonstrated them clearly, and gave the driver a fair chance to follow instructions. The video may also show road conditions, lighting, traffic, shoes, and the driver’s physical movement.
Police reports do not always match the footage. An officer may describe poor balance or missed instructions, while the video shows a more mixed picture. Medical history, injuries, and officer training records may also matter when deciding how much weight the tests should carry.
How We Handle Field Sobriety Cases in Orange County
Our office appears regularly in Orange County courts, including Fullerton, Santa Ana, Westminster, and the Harbor Justice Center in Newport Beach. In DUI cases involving field sobriety evidence, we review the footage, the report, the test conditions, and the officer’s training. We look for gaps between what was written and what actually happened.
Attorney Tammy Higgins has taken DUI and criminal cases through jury trial across Southern California. She knows how these tests are supposed to be given and how weak they can become when the rules are not followed. If the field sobriety evidence does not hold up, we challenge it through motions, negotiations, or trial preparation.
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