Being pulled over is stressful under any circumstances, but when a DUI is suspected, the pressure is even greater. What you say and do in the minutes after a traffic stop can have a significant impact on the outcome of any criminal case that follows. This article breaks down what you need to know about traffic stops, DUI arrests, and the rights you have under California law, so you are prepared before you ever find yourself in that situation.
What Gives Police the Right to Pull You Over?
Before an officer can lawfully stop your vehicle, they must have what is known as probable cause. This means a specific, articulable reason to believe a traffic law or another law has been violated. Common reasons for a DUI-related stop include erratic driving behavior, speeding, making an unsafe lane change, or running a red light.
One of the most common reasons people are pulled over for a suspected DUI is something they might not expect: driving at night without headlights on. Drivers who are under the influence and trying to be careful sometimes drive unusually slowly or hesitantly, which can itself attract police attention.
Importantly, officers cannot pull you over simply because you are leaving a bar or a restaurant that serves alcohol. There must be an observable traffic violation or driving behavior that creates reasonable suspicion. If a stop was made without proper cause, your defense attorney may be able to challenge the legality of the stop itself.
Your Right to Remain Silent
One of the most important things to remember during any police encounter is your constitutional right to remain silent. Under the Fifth Amendment, you cannot be compelled to incriminate yourself. In a practical sense, this means that beyond providing your name, driver’s license, vehicle registration, and proof of insurance when asked, you are not required to answer any other questions.
Officers often ask questions like: Where are you coming from? Have you been drinking? How much have you had to drink? You are not legally required to answer any of these. The safest response is to calmly let the officer know that you do not wish to speak without an attorney present. You are not being uncooperative. You are exercising a right that exists specifically to protect you.
Do not feel pressured into volunteering information. Statements made during a traffic stop can be used against you, and even answers that seem harmless can become evidence in a prosecution.
Field Sobriety Tests: What You Need to Know
If an officer suspects you are under the influence, they may ask you to step out of the vehicle and perform field sobriety tests (FSTs). These typically include exercises like walking a straight line, standing on one leg, or following a pen with your eyes.
Many drivers do not realize that they are not legally required to perform these tests in California. You can politely decline. Officers may tell you that refusing will work against you, but the decision to decline is within your rights and may actually benefit your case.
Even when these tests are performed, their results are not infallible. Medical conditions, physical limitations, nervousness, uneven road surfaces, and poor lighting can all affect performance. Additionally, if the officer did not administer the tests correctly or failed to follow proper procedure, the results can be challenged in court and potentially excluded from evidence.
Breathalyzer Tests and Implied Consent
California operates under what is called an implied consent law. When you applied for and accepted your California driver’s license, you legally agreed to submit to a chemical test (breath, blood, or urine) if you are ever lawfully arrested for a DUI. This means that once you are under arrest, you are required to take one of these tests.
It is important to understand the distinction between the two types of breath tests. The preliminary alcohol screening (PAS) device is the small handheld breathalyzer used on the roadside before arrest. In most cases, you are not required to take the PAS test unless you are under 21 or on DUI probation. However, once you are under arrest, you must submit to a chemical test.
The larger breathalyzer machine at the police station carries much stricter requirements. The officer must ensure the machine has been properly calibrated by a certified technician, and must observe you for a full five minutes before administering the test to make sure you have not burped, regurgitated, or otherwise contaminated the sample. Any failure to meet these requirements can provide your attorney with grounds to challenge the accuracy of the results.
When Can Police Force a Blood Test?
In certain circumstances, police can compel a blood test even without your consent. This typically occurs when you have refused a breath test, when law enforcement suspects drug use rather than alcohol (since a breathalyzer does not detect drugs), or when you are involved in an accident and are transported to a hospital where a blood test is more practical.
If a forced blood draw was conducted in your case, the circumstances under which it was taken matter. Your defense attorney can examine whether proper procedures were followed and whether the draw was legally justified.
Why Getting Legal Help Right Away Matters
The moments and hours after a DUI arrest are critical. Evidence is gathered, statements are recorded, and the foundation of the prosecution’s case begins to take shape. Having an attorney involved early gives your defense the best possible chance.
A criminal defense attorney can examine the legality of the traffic stop, challenge the administration and reliability of sobriety tests, scrutinize whether proper procedures were followed, and fight to have unlawfully obtained evidence excluded. These are not small details. They are often the difference between a conviction and a dismissal.
