Your Rights During a DUI Stop in California: What You Need to Know

A late-night drive home along Redlands Boulevard or the I-10 can turn into a life-altering event the moment you see flashing red and blue lights in your rearview mirror. Fear and confusion usually take over, but those emotions are your worst enemies during a police encounter. Most drivers unwittingly hand the prosecution all the evidence they need to secure a conviction. If you want to protect your freedom, you must understand your rights during a DUI stop in California and what you need to know to prevent the state from crushing your future. We do not just handle DUI cases. We dismantle the government’s arguments by using a level of legal education and aggressive tactics that most other firms cannot match. This guide provides the essential knowledge you need to navigate the complexities of California DUI law.

The Initial Stop: Reasonable Suspicion and Probable Cause

Law enforcement officers in Redlands cannot pull you over simply because they have a hunch. Under the Fourth Amendment of the U.S. Constitution and California law, an officer must have reasonable suspicion that a crime or traffic violation occurred. This could be something as minor as a broken taillight or as serious as swerving across lanes on the I-210. 

Once they stop you, the investigation shifts. The officer looks for probable cause to arrest you for driving under the influence. They watch for bloodshot eyes, listen for slurred speech, and sniff for the odor of alcohol. Every second of this interaction is being recorded, often by body- or dashcams. We scrutinize these recordings to find where the officer overstepped. If the initial stop lacked reasonable suspicion, the court might throw out the evidence they gathered afterward.

Your Right to Remain Silent: Silence is Power

Most people believe they can talk their way out of a ticket or an arrest. In a DUI investigation, this is almost never true. Anything you say will be documented in the police report and used against you in the San Bernardino County Superior Court. You are required to provide your driver’s license, registration, and proof of insurance under California Vehicle Code Section 12951. Failing to present your license is an infraction, but willfully refusing to display it to an officer is a misdemeanor.

Beyond providing those documents, you have the right to remain silent. You do not have to answer questions like “How much have you had to drink?” or “Where are you coming from?” Politely inform the officer that you are exercising your right to remain silent and that you want to speak with an attorney. Giving polite answers often leads to admissions that make it much harder for us to fight your case later. We know how to handle the fallout of a silent defendant, but we cannot unsay an admission of guilt.

Field Sobriety Tests: The Voluntary Trap

The officer might ask you to step out of the vehicle to perform physical exercises. These are known as Field Sobriety Tests (FSTs). They might include the walk-and-turn or the one-leg stand. Here is the reality: these tests are designed to make you fail. They are highly subjective, and the officer is the sole judge of your performance.

In California, Field Sobriety Tests are voluntary. You have the right to refuse them. Refusing these tests does not result in a license suspension, unlike refusing a chemical test after a lawful arrest. Officers often frame these requests as mandatory orders, but you should respectfully decline. By refusing, you deny the prosecution evidence of physical impairment that is often based on nothing more than an officer’s biased opinion. The California DMV confirms that these roadside tests are not required by law.

The Preliminary Alcohol Screening (PAS) Breath Test

Confusing the PAS test with the post-arrest chemical test is a common mistake. The PAS test is the handheld breathalyzer that an officer uses at the scene of the stop. For most drivers 21 and older who are not on DUI probation, the PAS test is voluntary under California Vehicle Code Section 23612.

Taking this test rarely helps you. If you blow under a 0.08, the officer can still arrest you based on other symptoms of intoxication. If you blow over, you just handed them the probable cause they needed. We frequently see cases where the PAS device was not calibrated correctly or used in high-wind conditions, which skewed the results. Refusing the PAS test is often the best way to protect your rights during a roadside investigation.

Implied Consent and Post-Arrest Chemical Tests

Everything changes once the officer places you under arrest. California’s Implied Consent law states that by driving in this state, you have already agreed to take a chemical test (blood or breath) if you are lawfully arrested for a DUI.

If you refuse this test after arrest, you face severe consequences, including the following:

• A mandatory one-year license suspension for a first offense
• No possibility of a restricted license during that year
• Enhanced penalties in criminal court if the jury convicts you

You do not have the right to speak to an attorney before deciding whether to take this post-arrest test. But you do have the right to choose between a breath or blood test in most situations. We know how to attack the science behind both. Blood samples can ferment if stored incorrectly, and breath machines have a known margin of error. We dig into the Title 17 regulations to see if the lab or the officer took shortcuts.

New 2026 Legislative Updates You Must Know

The legal landscape in California shifted significantly on January 1, 2026. Two major bills now impact how we defend your case. First, AB 366 extended the statewide ignition interlock device (IID) requirement through January 1, 2033. This means if you are convicted of a DUI in Redlands, you should expect to install a breathalyzer in your car to regain your driving privileges.

Second, AB 321 gives us a powerful new procedural tool. Under this law, courts can now reduce eligible wobbler felony offenses to misdemeanors at any time prior to trial. Previously, this usually happened at the preliminary hearing. This change allows us more time to gather mitigation evidence and negotiate for a better outcome. We stay current on these laws because being more educated than the prosecution is how we win.

The San Bernardino County Court Process for Redlands Arrests

If the Redlands Police Department or the San Bernardino County Sheriff arrested you, your case will likely be heard in the San Bernardino Superior Court. This jurisdiction is notoriously tough. The prosecutors are aggressive and have the state’s resources behind them. The San Bernardino Superior Court Criminal Division handles these matters at the San Bernardino Justice Center.

You have two battles to fight: the criminal case and the DMV hearing. You only have 10 days from the date of your arrest to request a DMV hearing to save your license. If you miss this window, your license will be suspended automatically. We take charge of both of these silos. We have spent years winning cases in this local system because we know the judges, the prosecutors, and the specific ways local law enforcement operates.

Why an Aggressive Defense is Your Only Option

A DUI conviction can destroy your career, drain your bank account, and land you in jail. The state is not looking to be fair. They are looking for a conviction. You need a legal team that is more educated in the science of DUI defense than the people trying to put you in jail. We have won so many cases because we do not accept the standard plea deal. We hunt for the win.

We understand the forensic science of alcohol metabolism, the technical mechanics of breathalyzers, and the strict procedural rules police must follow. We are reputable and trustworthy because we tell you the truth about your case, and then we go to war for you. We know how to win DUI cases because we have been doing it for decades.

Take the First Step to Protect Your Future

Do not leave your fate in the hands of the government. Your rights during a DUI stop in California are only as strong as the attorney you hire to defend them. We provide the aggressive, highly educated representation you need to fight these charges. The 10-day clock for your DMV hearing is already ticking. 

We offer free consultations to help you understand exactly where you stand and how we can dismantle the case against you. Contact Patrick Silva, Attorneys at Law, at 909-500-4819 today to start your defense.