DUI & DWI Defense in California

Reviewed by Ron Chini, Esq. · CA State Bar No. 263308 · DUI defense attorney in Irvine, CA since 2009.
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If you've been arrested for DUI in California, the most important thing to understand is that the clock is already running. The DMV gives you only 10 days to demand a hearing, and the criminal court process is separate from it. This guide explains both, what penalties you may face, and how a DUI is actually defended.

Two cases, one arrest

A single DUI arrest sets off two completely separate proceedings, on two different timelines, decided by two different bodies:

Winning one does not automatically win the other — but the evidence overlaps, and handling them together is how an experienced DUI attorney protects both your record and your license.

The 10-day DMV deadline

This is the deadline almost everyone misses. When you're arrested for DUI, the officer typically takes your physical license and serves you a pink temporary license that doubles as a suspension notice. From the date of arrest, you have 10 days to contact the DMV Driver Safety Office and demand an Administrative Per Se (APS) hearing. If you don't, the suspension takes effect automatically — usually 30 days after the arrest — no matter what later happens in criminal court.

Requesting the hearing on time does two things: it stays the suspension until the hearing is decided, and it forces the DMV to prove its case — giving your attorney a chance to challenge the stop, the arrest, and the test. DRAFT — verify the current APS procedure and the serving DMV Driver Safety Office with Ron before relying on this.

Read the full guide: the DMV hearing & the 10-day deadline →

DUI penalties in California

California treats most first, second, and third DUIs within a 10-year window as misdemeanors, with penalties that escalate sharply with each prior. A DUI causing injury, or a fourth offense, can be charged as a felony. The exact consequences depend on your record, your BAC, and the facts of the stop.

DRAFT — specific fine amounts, jail exposure, and suspension lengths must be verified against current Vehicle Code sections (VC 23536 et seq.) and reviewed by Ron before publishing.

How a DUI is defended

A DUI charge is not a conviction. The prosecution has to prove every link in the chain — the stop, the investigation, the testing, and the science — and each link can be challenged:

• The stop. Police need a lawful reason to pull you over. A stop that wasn't justified can suppress everything that followed.
• Field sobriety tests. FSTs are subjective and affected by nerves, footwear, medical conditions, and the roadside environment — they are far less reliable than they look.
• Breath & blood tests. Breath machines require proper calibration and observation periods; blood draws require proper handling. Rising-BAC, mouth alcohol, and medical conditions like GERD can all distort a reading.
• The paperwork. Missed steps in the arrest and chemical-testing procedures can undermine the case on both the court and DMV sides.

Which defenses apply depends entirely on your facts — that's what the free consultation is for.

Why work with Ron Chini

DUI defense has been Ron Chini's focus since 2009. You work directly with Ron — not a call center, a "lead-gen" middleman, or a rotating cast of associates. He defends clients across Southern California from his Irvine office — in Orange County, Riverside County, San Bernardino County, Los Angeles County, and San Diego County — in English and Farsi, with a free consultation and flexible payment plans.

Ron is an experienced DUI defense attorney; he does not claim to be a certified specialist, and no result is ever guaranteed.

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Ron Chini, Esq.

DUI Defense Attorney · CA State Bar No. 263308

Ron has focused on DUI and criminal defense from his Irvine office since 2009. You work directly with him — not a paralegal or a call center.

Learn more about Ron Chini →