Riverside DUI Defense Attorneys

Understanding BAC Thresholds for DUI

California uses blood-alcohol concentration (BAC) to determine whether a motorist has exceeded an applicable legal limit. The limits vary by age and license type:

• 0.08% or higher for standard adult drivers.
• 0.04% or higher forcommercial driver’s license (CDL) holders.
• 0.01% or higher for drivers under 21 under the state’s zero-tolerance policy.

Law enforcement agencies also use specialized tests when they suspect impairment by prescription medications, illicit drugs, or other controlled substances. Our lawyers examine whether officers followed the required chemical and field sobriety testing protocols and challenge unreliable results in court.

Can I Face a DUI Charge If My BAC Was Under 0.08%? 

Yes. DUI laws penalize impairment, not only a breathalyzer result or BAC reading. You can be charged when drugs or alcohol compromise your ability to drive safely even if your BAC is below 0.08%. This is known as “subjective impairment.”

An officer still needs probable cause to lawfully arrest you, such as drifting across lanes, reacting slowly at green lights, or driving without headlights at night. Without a high BAC reading, officers must rely on a specific timeline of observations to construct a narrative of impairment.

Our legal team, led by a former public defender, understands how prosecutors build these cases. We challenge subjective observations and carefully review police reports for inconsistencies in the prosecution’s case.

What Are the Penalties for a DUI Conviction?

DUI penalties depend on the defendant’s prior convictions, BAC, and aggravating factors such as accidents or injuries. Potential penalties include:

• A first DUI can result in fines of up to $1,000, 48 hours to six months in jail, a license suspension of up to six months, and mandated DUI education.
• For a second DUI, penalties can include up to $1,000 in fines, a maximum of one year in jail, a license suspension of up to two years, and mandated DUI education.
• A third DUI can result in a maximum fine of $1,000, up to one year in jail, and license revocation for up to three years.
• A fourth DUI can result in fines of up to $1,000, up to three years in prison, and license revocation for up to four years.

The consequences can extend far beyond incarceration and license restrictions. Defendants may also face mandatory court assessments, personal and professional consequences, and difficulty passing background checks for employment, housing, or volunteer opportunities.

What Is a DUI Lookback Period?

California has a ten-year lookback period for DUI offenses, which means prior offenses within this window count against you. Priorable offenses include past DUIs, out-of-state DUI convictions, expunged DUIs, and prior “wet reckless” plea bargains. Dismissed charges and offenses older than a decade don’t count toward this total.

When Is DUI a Felony? 

While most first, second, and third-time DUI offenses are misdemeanors, aggravating circumstances can elevate the allegation to a serious felony. A conviction can carry severe consequences, including increased fines, prison time, and the loss of the ability to drive and other civil liberties.

Felony DUI allegations and related sentencing enhancements can involve the following circumstances:

• Prior felony DUI (VC § 23550.5)
• DUI causing injury (VC § 23153)
• DUI causing death (manslaughter)
• Fourth DUI within ten years (VC § 23550)
• DUI with a minor under 14 in the vehicle, which can trigger a sentencing enhancement (VC § 23572) 

Facing a felony DUI charge is terrifying, but an arrest isn’t a conviction. Because the stakes are high, you need an attorney prepared to challenge the prosecution’s case. We can fight to protect your record and mitigate the long-term consequences of a conviction.

Understanding DUI & Implied Consent Laws

Operating a vehicle in California is a conditional privilege. Under the state’s implied consent law, licensed drivers agree to submit to a blood or breath test after a lawful DUI arrest.

The rules apply once you’re lawfully arrested. If you refuse the mandatory post-arrest test, you’ll face an administrative suspension of your driver’s license by the DMV, along with harsher sentencing penalties if you’re convicted.

Roadside PAS Tests vs. Post-Arrest Chemical Tests

A preliminary alcohol screening test is the handheld breath test an officer may request during a roadside DUI investigation. An officer must advise an adult driver that this PAS test isn’t mandatory and doesn’t replace the separate blood or breath testing required after a lawful arrest under Vehicle Code § 23612.

Drivers under 21 and drivers on probation for a prior DUI don’t have the same ability to refuse a PAS test without consequences. The distinction between roadside screening and post-arrest chemical testing matters when we evaluate whether officers followed the required procedures and how the resulting evidence may be used.

Navigating Marijuana DUI Charges

California was one of the first states to decriminalize recreational marijuana for adults over 21, but driving while impaired by cannabis remains strictly illegal. Prosecuting a marijuana DUI is notoriously complex.

Because cannabis metabolizes slowly, its inebriating effects can wear off in hours while standard drug tests continue to show positive results for days or even weeks. Prosecutors must still prove impairment at the time of driving.

If you’re facing a marijuana-related DUI charge, it’s crucial to secure a robust defense from our attorneys. We understand the scientific limitations of these tests and use them to challenge the evidence against you.

Importance of Consulting with Our DUI Defense Firm

Every person is entitled to a strong defense. After a DUI arrest, hiring a lawyer is critical to protecting your constitutional rights. Our attorneys provide accessible counsel and clear communication throughout the process. We never rely on generic strategies. Instead, we personalize each defense to the client’s circumstances, needs, and goals.

Don’t let a DUI arrest derail your future. Call (951) 821-4647 to schedule a free consultation with our fierce advocates.

Personalized DUI Defense & Case Preparation

A dedicated attorney, paralegal, and case manager support each client throughout the case, providing timely guidance when the stakes are highest.

With over 25 years of experience, we prepare for the evidentiary and courtroom issues that can shape a DUI case. That includes examining the traffic stop, officer observations, field sobriety testing, chemical test procedures, and inconsistencies in police reports.