Can a Prior DUI Conviction Give New Jersey Police the Right to Detain You for Field Sobriety Tests?

If you have a prior DUI conviction on your record, you may wonder whether that fact alone gives a New Jersey police officer the right to pull you over, detain you, and require you to perform Standardized Field Sobriety Tests (SFSTs) during a routine traffic stop. It is a question that comes up regularly in New Jersey DUI defense — and the answer has critical constitutional implications for drivers throughout the state.

The short answer is no. A prior DUI conviction, standing alone, is not sufficient justification for a police officer to detain you and administer field sobriety tests. Understanding why requires a closer look at the legal standard New Jersey courts have established — and what it means for your case.

The Legal Standard: Reasonable and Articulable Suspicion

Under both the United States Constitution and the New Jersey Constitution, you have the right to be free from unreasonable searches and seizures. This protection does not disappear simply because you are driving.

New Jersey courts have long recognized that a routine traffic stop does not automatically authorize law enforcement to transform the encounter into a full DUI investigation. Before a police officer can lawfully detain a driver for the purpose of administering field sobriety tests, the officer must possess reasonable and articulable suspicion of actual impairment — based on specific, objective, observable facts.

This is not merely a theoretical standard. It is a constitutional requirement with real consequences for your case.

State v. Bernokeits: The Landmark New Jersey Case

The most important New Jersey authority on this issue is State v. Bernokeits, 424 N.J. Super. 167 (App. Div. 2011). The Appellate Division’s decision in Bernokeits fundamentally shaped the law governing police authority to administer roadside field sobriety tests in New Jersey.

The Bernokeits court held that if field sobriety tests are administered and a defendant’s attorney challenges those tests through a Motion to Suppress, the State bears the burden of demonstrating, by a preponderance of the evidence, that the officer had a reasonable and articulable suspicion that the driver was intoxicated before those tests were administered.

The consequences of this ruling are profound. If the State cannot meet that burden — if the officer cannot point to specific, objective facts supporting a reasonable suspicion of impairment at the time of the detention — the evidence obtained through the field sobriety tests must be suppressed. Once suppressed, that evidence cannot be used against you in court. Depending on the facts of your case, suppression of field sobriety test evidence can result in the collapse of the State’s prosecution entirely.

What Counts as “Reasonable and Articulable Suspicion” of Impairment?

Reasonable suspicion must be grounded in observable, objective facts — not hunches, assumptions, or background information about a driver’s history. Courts evaluating reasonable suspicion look at the totality of the circumstances at the time of the encounter.

Factors that New Jersey courts have found may contribute to reasonable suspicion of impairment include:

• The odor of alcohol emanating from the vehicle or the driver
• Slurred or incoherent speech
• Bloodshot, glassy, or watery eyes
• An admission by the driver of alcohol or drug consumption
• Unsteady movement or balance issues
• The time of day or night and the circumstances of the stop
• Erratic or dangerous driving behavior observed prior to the stop

No single factor is necessarily dispositive. Courts look at the totality of what the officer observed. Importantly, however, the officer must be able to articulate specific facts — not merely a general suspicion based on the driver’s record or the officer’s experience with DUI offenders generally.

Why a Prior DUI Conviction Alone Is Not Enough

This brings us back to the central question: Can a police officer rely on a driver’s prior DUI conviction as a basis — or even as a contributing factor — to detain that driver for field sobriety tests?

The answer, as a matter of constitutional law, is that a prior conviction, by itself, is not a substitute for present-day, observable indications of impairment. A prior DUI conviction is a historical fact about the driver. It tells an officer nothing about whether that driver is impaired at the moment of the stop. It is not an objective observation of current behavior. It is not something the officer witnessed. And it does not, on its own, give rise to a reasonable and articulable suspicion that the driver is operating a vehicle while intoxicated on that particular day.

If a police officer relies primarily — or solely — on your prior DUI history to justify detaining you for field sobriety tests without other objective indications of present impairment, that detention may be constitutionally invalid. Any evidence obtained as a result of that unlawful detention — including your performance on field sobriety tests, any statements you made, and potentially even a subsequent breathalyzer result — may be subject to suppression under the “fruit of the poisonous tree” doctrine.

How This Issue Plays Out in a Real DUI Case

This is not an abstract legal concept. It arises in courtrooms throughout New Jersey, including in trials I handle regularly as a New Jersey DUI defense attorney.

Here is how the issue typically develops: A driver is stopped for a minor motor vehicle infraction — perhaps a failure to signal, a wide turn, or a momentary lane departure. The officer runs the driver’s license and discovers a prior DUI conviction. Without observing any meaningful signs of current impairment, the officer nevertheless orders the driver out of the vehicle and directs the driver to perform a battery of Standardized Field Sobriety Tests.

If those tests are then challenged through a Motion to Suppress, and the court finds that the officer lacked a reasonable and articulable suspicion of impairment independent of the prior conviction, the results of those tests — and everything that followed — may be thrown out.

The Suppression Motion: Your Most Powerful Tool

In cases where the legality of the field sobriety test detention is in question, filing a Motion to Suppress is often the most important step in your DUI defense. Under Bernokeits, once the motion is filed, the burden shifts to the State to justify the detention. The State must come forward with evidence establishing that the officer had sufficient, objectively articulable grounds to suspect impairment at the time the tests were demanded.

Many DUI cases are won or lost at the suppression stage — long before the question of guilt or innocence is ever reached. If critical evidence is suppressed, prosecutors frequently cannot sustain the charges, and cases are dismissed.

What to Do If You Have Been Charged With DUI in New Jersey

If you were stopped for a routine motor vehicle offense and an officer escalated the encounter into a DUI investigation — particularly if you have a prior DUI on your record — the circumstances of that detention deserve careful legal scrutiny. You may have strong grounds to challenge the constitutionality of the stop and the field sobriety tests administered.

Do not assume that because you have a prior conviction, you have no defense. Your rights do not expire with a prior DUI. The Constitution still applies. And an experienced New Jersey DUI defense attorney can identify and argue the suppression issues that could make the difference in your case.

Contact the Law Office of Anthony J. Vecchio, Esq.

If you or someone you know has been charged with DUI or DWI in New Jersey — especially as a second or subsequent offense — contact my office today. I handle DUI defense throughout New Jersey, with a focus on protecting my clients’ constitutional rights at every stage of the case, from the initial stop through trial.

📞 Call today for a consultation.

Anthony J. Vecchio, Esq., New Jersey DUI & Criminal Defense Attorney — Woodbridge, New Jersey