Field Sobriety Test Lawyer in Fort Worth

Roadside Tests, Chemical Tests & Texas License Consequences

Field sobriety tests are roadside exercises officers use to evaluate coordination, balance, divided attention, and the ability to follow instructions. They aren’t chemical measurements of blood alcohol concentration. Breath and blood testing involve separate legal procedures, while chemical analysis may also be used in investigations involving drugs.

A driver can decline field sobriety testing, but that decision doesn’t prevent a DWI arrest. An officer may rely on driving behavior, statements, appearance, odors, open containers, video, and other observations when determining whether probable cause exists.

Administrative License Revocation is a separate process involving qualifying breath or blood test refusals or results. A field sobriety test result doesn’t by itself trigger that process. The consequences in a particular case depend on the stop, the arrest, the type of testing requested, and the available evidence.

Need a DWI defense attorney in Fort Worth? Call (817) 440-3953 or submit the online contact form to request a free initial consultation with Bryan Wilson, The Texas Law Hawk.

What Happens If You Refuse a Field Sobriety Test?

If a police officer initiates a traffic stop and requests roadside sobriety exercises, the officer may already be investigating suspected impaired driving. The initial reason for the stop, observations made before testing, questions asked, and instructions given can all become part of the probable-cause analysis.

After a person declines field sobriety testing, the officer can continue the investigation and may make an arrest based on the totality of the circumstances. An arrest may be followed by a request for chemical tests of breath or blood. Refusing one of those tests or producing a qualifying result can create a separate risk of a driver’s license being suspended through the Administrative License Revocation process.

Declining roadside exercises and refusing a later breath or blood test aren’t the same decision. The potential legal and administrative consequences depend on what the officer requested, when the request occurred, whether a warrant was obtained, and how the person responded.

There isn’t a universal answer about whether every driver should perform or decline field sobriety tests. After an arrest, a Fort Worth DWI attorney can examine the sequence of events rather than treating one decision as the entire case.

Types of Field Sobriety Tests

There are three standardized field sobriety tests: the horizontal gaze nystagmus, the one-leg stand, and the walk-and-turn. Officers often wear body cameras or have cameras mounted in their vehicles when conducting these tests. Available footage can show the instructions, surface, weather, footwear, movements, and interaction more completely than an officer’s written summary alone.

Issues that may require closer review include:

• Horizontal Gaze Nystagmus: This is also known as the pen test. The officer holds a pen, finger, or small light in front of the person and asks the person to follow its movement with the eyes. The officer watches for nystagmus, which is an involuntary jerking movement of the eyes. This test should be considered as part of the standardized battery rather than treated as the sole indicator of intoxication when the other exercises can be administered.
• One-Leg Stand: In this test, the officer asks the person to raise one foot, keep it elevated, and count according to the instructions. High heels, wind, unstable ground, shivering from cold, medical conditions, or poor balance could affect performance even when alcohol isn’t the cause. The review may also consider whether the instructions were complete and whether the officer demonstrated the exercise.
• Walk-and-Turn: The officer directs the person to take heel-to-toe steps along a line, turn as instructed, and return. This exercise evaluates balance, divided attention, movement during the turn, and the ability to follow multiple instructions. A request to exit a vehicle is distinct from a request to perform this exercise, and footage may reveal whether the testing location or instructions affected performance.

Non-Standard Field Sobriety Tests

Some non-standard field sobriety tests may include:

These supplemental exercises aren’t part of the three-test standardized battery. Their relevance depends on how the officer requested and demonstrated the exercise, how the person performed, what the officer documented, and whether the exercise was connected to the probable-cause determination.

A request to answer questions, an instruction to exit the vehicle, and a request to complete a physical or cognitive exercise are different parts of a roadside encounter. A person may state that questions won’t be answered without counsel while remaining calm and not physically resisting. This communicates an intention to assert your right to remain silent.

Reviewing Field Sobriety Test Evidence in Fort Worth

Bryan Wilson, The Texas Law Hawk handles field sobriety test issues as part of DWI defense. As a Fort Worth DWI defense lawyer admitted to practice in all Texas state courts, Attorney Wilson uses the available evidence and Texas law to build a defense around the specific stop and investigation.

The review can compare the police report with body-camera video, dash-camera footage, and other available recordings. It may examine whether the officer gave and demonstrated standardized instructions, documented each claimed clue, selected an appropriate testing surface, and accounted for weather, footwear, traffic, lighting, or other environmental conditions.

Medical and physiological conditions can also affect balance, coordination, comprehension, or eye movement. The analysis may consider injuries, mobility limitations, vision issues, neurological conditions, fatigue, anxiety, and whether the officer asked about or documented circumstances that could resemble signs of impairment.

Field sobriety evidence must be evaluated within the broader investigation. That includes the reason for the traffic stop, the length and scope of the detention, observations made before testing, the timing of the arrest, later breath or blood requests, and the facts the officer relied on to claim probable cause.

Bryan Wilson, The Texas Law Hawk provides personalized service and clear, frequent communication directly with clients rather than relying solely on an assistant or paralegal. The firm serves DWI clients throughout Tarrant County, including Fort Worth and surrounding cities and courthouses.