Can You Challenge Field Sobriety Test Results?

Can You Challenge Field Sobriety Test Results?

Failing a field sobriety test during a traffic stop may make it feel like your case has already been decided. Police often see these tests as clear proof that a driver is impaired, but the truth is a lot more complicated than that. During a field sobriety test, an officer must make subjective observations about a driver, meaning it is possible to challenge those results in court. Understanding how these tests work and where they fall short can make a real difference in your OWI defense.

Key Takeaways

• Field sobriety tests are standardized, but officer error and improper administration can compromise the results.
• Despite being sober, you might “fail” a test due to a medical condition, injury, or even nervousness.
• Performance can also be impacted by environmental factors like poor lighting or uneven pavement.
• An experienced OWI attorney can build a strong defense by reviewing dashcam or bodycam footage, officer reports, and testing conditions.

Can Improper Instructions Affect Field Sobriety Test Results?

Field sobriety tests like the walk-and-turn or one-leg stand follow strict guidelines established by the National Highway Traffic Safety Administration (NHTSA). Officers are required to give specific verbal instructions and physical demonstrations before asking a driver to perform each test.

However, if an officer skips a step, gives unclear directions, or fails to properly demonstrate the test, the results become far less reliable. Drivers who misunderstood the instructions may perform poorly, not because of impairment, but because of confusion. This is one of the more common issues raised in OWI defense cases, and it often becomes clear when comparing bodycam footage to the official NHTSA training manual.

How Can Medical or Physical Conditions Affect Your Performance?

Field sobriety tests assume that every driver has the same physical baseline, but that is rarely true. Conditions like inner ear disorders, past injuries, arthritis, or even a person’s natural balance can all affect how someone performs on these tests.

Age and weight can also play a role. Older adults or individuals with joint pain may struggle with the one-leg stand regardless of sobriety. Anxiety alone, especially the kind brought on by flashing lights and an officer’s scrutiny, can cause someone to stumble, forget instructions, or appear disoriented. None of these factors indicate alcohol or drug use, yet they are often misread as signs of impairment.

Can Weather, Lighting, or Road Conditions Make the Tests Less Reliable?

Field sobriety tests are typically conducted on the side of the road, not in a controlled environment. That distinction matters. Uneven pavement, gravel, or a sloped shoulder can make it difficult for anyone, sober or not, to complete a balance-based test successfully.

Poor lighting can also prevent an officer from accurately observing a driver’s performance. Passing traffic can also create distractions or safety concerns that interfere with a driver’s ability to focus or an officer’s ability to concentrate on the driver’s performance. Michigan’s unpredictable weather makes these environmental factors especially relevant in local OWI cases.

How Can Officer Errors Be Used to Challenge the Results?

Officers are human, and human error is common during roadside testing. Some of the most frequent mistakes include miscounting steps during the walk-and-turn test, misjudging a driver’s balance, or failing to account for outside factors like footwear or terrain.

An officer’s personal bias can also influence how they interpret a driver’s performance. If an officer already suspects impairment, they may unconsciously score the test in a way that confirms that suspicion. A skilled OWI attorney can cross-examine the arresting officer, request their training records, and compare their report against video evidence to expose these inconsistencies.

Protect Your Rights After an OWI Arrest

A failed field sobriety test is not the end of your case. These tests are far from perfect, and a wide range of factors can affect the outcome. Challenging these results requires a careful review of the evidence and a clear understanding of proper testing procedures.

If you are facing OWI charges in Michigan, do not assume the case against you is airtight. Discuss your situation with Lucido & Manzella, P.C. today to protect your rights and your future.