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Maryland Criminal Defense · DUI & DWI

The Field Sobriety Test in Maryland Is Not What You Think — Here's Why It Was Never a Test You Could Pass

Standing on the shoulder, following a pen with your eyes and balancing on one leg, it feels like a fair chance to prove you are fine. It was built to do the opposite.

By Amir Guerami, Esq. · The Guerami Law Firm, LLC

The Fear

The few minutes that feel like the verdict

You are pulled over on a Maryland road at night. The trooper has asked you to step out of the car. Now you are standing in the wash of headlights being asked to follow a small light with your eyes, walk an invisible line heel-to-toe, turn the way you were told, and stand on one foot while you count out loud. Every instinct says: cooperate, do it well, prove you are fine, and this ends. So you try. And in trying, you may have just done the most damaging thing you could do.

The fear that follows a drunk-driving stop is real and specific: that those few minutes on the shoulder already decided everything, that _the case is over before it started_. A DUI in Maryland is not a slap on the wrist. Under _Md. Code, Transportation § 21-902_, a first-offense DUI can carry up to a year of incarceration, a fine, and twelve points — enough on its own to put your license in jeopardy with the Motor Vehicle Administration. It surfaces on background checks for jobs, apartments, and professional licenses for years.

That is the honest worst case, and I am not going to soften it. But here is the truth the roadside moment hides: the field sobriety test is not a test you pass or fail. It is a tool for gathering evidence against you. Understanding what it actually is — and what it is not — is the first step out of the fear.

The Law in Plain English

What the field sobriety test actually is

There are three "standardized" field sobriety tests, developed decades ago by the federal highway-safety agency and used by police across the country, including in Maryland:

1. _The eye test (Horizontal Gaze Nystagmus)._ The officer moves a pen or light across your field of vision and watches your eyes for a specific involuntary jerking. You cannot feel it happening, and you cannot control it. You also have no way to know what the officer claims to have seen.
2. _The Walk-and-Turn._ You take nine heel-to-toe steps along a line, turn in a prescribed way, and walk back. It is a "divided attention" test — designed to load you with instructions and movement at the same time.
3. _The One-Leg Stand._ You raise one foot roughly six inches off the ground and count aloud while the officer watches and times you.

Each test is scored on "clues" — small, predefined things the officer is trained to count: starting too soon, stepping off the line, swaying, putting a foot down, using arms for balance. The officer counts the clues and reaches a conclusion about impairment. That conclusion becomes a line in the report and, later, testimony in court.

The field sobriety test feels like a fair chance to prove you are fine. It was designed to do the opposite — to produce evidence, scored by the person who already decided to investigate you.

The Distinction Almost No One Knows

Two very different "tests" — do not confuse them

Here is the part that changes how you should think about that roadside moment: in Maryland, the standardized field sobriety tests are generally voluntary. You are not legally compelled to perform them, and declining them does not carry the automatic administrative license penalty that refusing the official chemical breath test after arrest can trigger.

That distinction is enormous, and it is constantly confused. There are two very different "tests" in a Maryland DUI stop:

★Know Which Test Is Which

• The roadside field sobriety tests — the eye test, the walking, the balancing. Generally voluntary, and not the same machine as the breath test.
• The official chemical test — the evidentiary breath or blood test, usually given at the station or a barracks after arrest. This one is governed by Maryland's implied-consent law, and refusing it has separate, serious license consequences through the MVA.

People mix these up all the time. They refuse the wrong one, or submit to the wrong one, because no one explained that they are different machines with different rules. I am not telling you what to do at the roadside — every situation is different, and the safest move is always to speak with a defense lawyer about your specific facts. But you should at least know the moment was not as one-sided as it felt.

The Insider Lens

What prosecutors actually look at

This is where my years on the other side of the courtroom matter. When I was a Maryland State's Attorney, a DUI file did not impress me just because the officer wrote "subject failed all three tests." A conclusion is not proof. I read the entire sequence, because the value of a field sobriety test rises or falls on how it was conducted — and that is exactly where these cases come apart.

• _The conditions._ Was the test run on flat, dry, level pavement, or on a gravel shoulder, a slope, or in the rain? Was the only light coming from passing traffic and the cruiser's strobes?
• _The instructions._ The standardized tests have specific procedures and specific words. When an officer improvises or rushes them, the results lose reliability.
• _The eye test._ I looked at this one especially hard, because it is the easiest to perform incorrectly and the hardest for a jury to evaluate.
• _The footage versus the report._ The gap between what an officer wrote and what the body camera shows is where a defense lives.

A "clue" counted on a sloped gravel shoulder, in the rain, at midnight, is not the same as a clue counted in a controlled setting. On the report they look identical. They are not.

The Traps

Common mistakes defendants make

The roadside tests do their real damage in combination with the mistakes that follow. The most common ones I see:

!Mistakes That Make It Worse

• Believing the tests are objective. They are subjective observations recorded by someone who already suspected you. The "score" is the officer's judgment, not a meter reading.
• Performing every test and narrating along the way. "I have a bad knee," "I only had two," "I'm just tired" — roadside explanations routinely hand the State the words it needed.
• Assuming poor balance equals guilt. Age, weight, prior injuries, inner-ear and neurological conditions, exhaustion, the wrong footwear, and ordinary fear all degrade performance — sober or not.
• Confusing the roadside tests with the official breath test. They carry completely different consequences. Treating them as the same thing leads to the wrong decision at the worst possible moment.
• Assuming the case is over. People plead to the first offer because they think the roadside sealed it. It did not seal anything on its own.

The Defense

What a real defense looks like

A real defense does not begin with an apology. It begins with a question: _what can the State actually prove, and how was it gathered?_

We start with the evidence the State itself created — the body-camera footage and the officer's written report, placed side by side. We check whether each field sobriety test was administered the way the standardized procedures require, because deviations from those procedures undercut the reliability of the results. We examine the physical conditions: the surface, the slope, the weather, the lighting, your footwear, any medical condition that affects balance or the eyes. We scrutinize the eye test for whether it was qualified and performed correctly. And because the roadside tests are only one piece, we look hard at the lawfulness of the stop itself and at the separate chemical test that came later.

★Where the Leverage Lives

• Sometimes the evidence honestly supports the lesser charge — a DWI under § 21-902(b) rather than a DUI under § 21-902(a) — and the difference is measured in penalties and points.
• For many first-time clients, Probation Before Judgment (PBJ) is a realistic goal — a disposition that, handled correctly, can keep a conviction off your record.
• For others, the strongest move is to take a winnable case to trial and force the State to prove every element, including the reliability of the very tests it is leaning on.

I cannot promise you any single outcome, and you should be wary of anyone who does. What I can tell you is that the few minutes on the shoulder were the State's opening argument — and opening arguments get answered.

!The Clock Running in the Background

• If the stop led to a breath test that came back over the limit, or to a refusal of that test, you may have only 30 days from the notice to request an MVA hearing and protect your license.
• That license case is separate from the criminal case. Missing the deadline can cost you your license even if the criminal charge goes well.

The roadside test is not your verdict. It is the starting line, and the race is still yours to run.

Legal Disclaimer

This article is for general educational purposes only. It is not legal advice and does not create an attorney-client relationship. Maryland law changes, and every case turns on its own facts. If you or someone you love has been charged, speak with a Maryland criminal defense attorney about your specific situation before making any decisions.

Stand on Both Sides of the Courtroom

If you have been charged with a crime or a serious traffic offense in Maryland, do not plead until you have spoken to a lawyer who has stood on both sides of the courtroom. Contact The Guerami Law Firm, LLC through NoPleaMD.com for a confidential consultation with Amir Guerami and his team.