Murrieta & Riverside County DUI Defense
DUI Defense
Thousands of DUI cases defended at the Southwest Justice Center and throughout Riverside County. We understand DUI science, testing limitations, and law-enforcement procedure.
What You Need to Know About DUI defense
Most people charged with a first DUI in California have never had a serious encounter with the criminal justice system. The process — the arrest, the booking, the DMV hearing, the arraignment — is disorienting, and the consequences feel overwhelming before anyone explains what they actually mean. At the Law Office of Nic Cocis, we’ve handled DUI defense in Murrieta and Southwest Riverside County for over 25 years. We explain the process clearly, we move on the DMV hearing before the ten-day window closes, and we build a defense from the evidence — not from assumptions.
What a DUI Defense Actually Looks Like
The Two Cases Running Simultaneously
Every DUI arrest triggers two separate proceedings: the criminal case and the DMV administrative hearing. They run on different tracks, under different rules, and each one has its own consequences. Missing either one changes the outcome.
The criminal case is what most people think of — arraignment, pretrial motions, potential trial. The charge under Vehicle Code § 23152 must be proven beyond a reasonable doubt. The prosecution must establish that you were driving, that you were under the influence of alcohol or drugs, and — if relying on a per se theory — that your BAC was at or above the legal threshold at the time of driving. Each element can be challenged.
The DMV Administrative Per Se hearing is civil, not criminal. It focuses on three narrow questions: whether the officer had reasonable cause to believe you were driving while intoxicated, whether you were lawfully arrested, and whether your BAC tested at or above the legal limit. The standard of proof is preponderance — more likely than not — not beyond a reasonable doubt. And the deadline is absolute: ten days from the arrest date to request the hearing, or the suspension becomes automatic. We request the hearing the same day you call.
Where DUI Defenses Actually Come From
People assume a DUI is ironclad if the breath test shows a number above 0.08%. That’s not how it works. Several real defenses exist, and they’re not technicalities — they’re legal and scientific challenges to how the evidence was gathered and what it actually shows.
The stop itself.
An officer must have reasonable suspicion of a traffic violation or criminal activity to initiate a stop. A stop without lawful basis is unconstitutional, and evidence gathered from it — including field sobriety test results and breathalyzer readings — can be suppressed. No evidence, no case.
Field sobriety test administration.
The National Highway Traffic Safety Administration has specific protocols for the three standardized field sobriety tests — the horizontal gaze nystagmus, the walk-and-turn, and the one-leg stand. Officers who administer them incorrectly undermine their evidentiary value. Physical conditions — inner ear issues, back problems, obesity, fatigue, medications — affect performance on these tests independent of intoxication.
Breathalyzer reliability.
Breath test machines require regular calibration and maintenance. The results can be affected by mouth alcohol, GERD, certain medical conditions, and the presence of substances that interfere with the device’s fuel cell chemistry. Calibration records are discoverable, and devices with irregular maintenance histories produce suspect results.
Rising blood alcohol.
Alcohol absorbs into the bloodstream at a rate that varies by individual. A BAC taken an hour after driving may be higher than it was while driving — meaning the test result doesn’t accurately reflect the BAC at the time of the alleged offense. Depending on the timeline of the stop, consumption, and testing, this argument can be significant.
What to Expect When You Work with Us
01
Same-Day DMV Hearing Request
The ten-day window doesn’t wait. We request the Administrative Per Se hearing immediately and schedule the full case review within days of your call.
02
Evidence Investigation
We pull the dashcam and bodycam footage, the officer’s training certifications on field sobriety tests, the breathalyzer’s maintenance and calibration logs, and the arrest report. If the stop was thin or the test was administered incorrectly, we find it.
03
Negotiation with Knowledge
Most DUI cases in Riverside County resolve through negotiation. Going into those discussions knowing exactly what the prosecution can and can’t prove changes what’s achievable. A wet reckless under Vehicle Code § 23103/23103.5 is a meaningfully different outcome than a DUI conviction — it avoids the mandatory license suspension, the DUI education program designation, and the prior-conviction treatment in any future case.
04
DMV Hearing and Court
We appear at the DMV hearing and in court. Both proceedings are handled. Nothing falls through the cracks.
Why Choose Law Office of Nic Cocis
Ten-Day Window Expertise
We don’t miss DMV deadlines — ever
Former DA’s Office Intern
Knows exactly how DUI cases are prosecuted and where they’re weak
Over 1,000 Criminal Cases
DUI defense is part of a 25-year Riverside County practice
Multilingual Services
English, Romanian, and Spanish available
Frequently Asked Questions
Facing a DUI Charge in Murrieta?
The first 72 hours after a DUI arrest matter. Contact the Law Office of Nic Cocis for a consultation. We serve clients in Murrieta, Temecula, Menifee, Lake Elsinore, Wildomar, Winchester, Canyon Lake, French Valley, and throughout Southwest Riverside County.
