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Our Fullerton Office is located at:

Law Offices of David S. Chesley, Inc.
Fullerton Criminal Defense and DUI Lawyers

122 North Harbor Blvd.
Fullerton, CA 92832
(714) 770-8738

DUI Lawyer Fullerton, CA

A Fullerton, CA DUI lawyer is a criminal defense attorney who represents drivers accused of operating a vehicle under the influence of alcohol or drugs, defending both the criminal case in court and the administrative license action at the DMV.

At the Law Offices of David S. Chesley, our Fullerton DUI attorneys act fast to protect your license, your record, and your future. 95% of DUI clients receive no jail time, and we are prepared to take your case all the way to a "not guilty" verdict through trial if that's what it takes to defend your freedoms.

  • DUI is two cases at once: a criminal case in Orange County Superior Court and a separate DMV action that can suspend your license before you ever see a judge.
  • Deadlines are immediate: you generally have 10 days from arrest to request a DMV hearing or you risk automatic suspension.
  • Penalties escalate quickly: even a first offense can mean fines, classes, ignition interlock, and insurance spikes; priors, injuries, refusals, or high BAC drive sentences higher.
  • Local nuance matters: Fullerton PD runs checkpoints and saturation patrols, and Orange County offers a specialized DUI Court track for certain repeat, non-violent cases.


What Qualifies as a DUI in California?

California’s DUI laws appear primarily in the Vehicle Code and apply throughout the state, including Fullerton. Below are the most frequently charged DUI-related offenses and enhancements, with links to the official statutes.

The Fullerton, CA DUI Stop, Arrest, and What Happens Next

Most DUI cases follow a familiar arc: a stop (or checkpoint), field sobriety tests, a preliminary breath test, arrest, and an evidentiary breath or blood test at the station or hospital. In Fullerton, the police frequently use checkpoints and saturation patrols; those operations must follow constitutional guidelines to be valid.

  • Field Sobriety Tests (FSTs): Coordination tests are subjective and easily influenced by fatigue, footwear, nerves, or medical conditions.
  • Preliminary Alcohol Screening (PAS): Typically optional for adults before arrest, but results are often used to justify arrest; under-21 and probationers may be required to blow.
  • Breath/Blood Testing: After a lawful arrest, chemical testing is required by the implied consent law; refusals trigger harsh license penalties and added jail exposure in court.
  • DMV Notice (“Pink Slip”): You generally have 10 days to demand a hearing to contest an administrative suspension.

From the moment of arrest, your timeline splits: one track at the DMV and one in criminal court. Winning the DMV hearing does not dismiss the criminal case, and losing it can suspend your license before you ever get a trial date.

DUI Penalties and Sentencing in Fullerton, CA

Sentencing depends on your prior record, BAC, whether there was a refusal, whether anyone was injured, and whether a child was present. Below are typical statutory ranges; local practices and the judge also matter.

First, Second, and Third Offenses (Typical Ranges)

  • First Offense: Fines and assessments, probation, DUI education (3–9 months), license suspension or IID, possible jail (often converted to alternatives).
  • Second Offense (within 10 years): Mandatory jail measured in days, 18-month program, longer suspension or IID, stricter probation terms.
  • Third Offense: Substantial jail, 30-month program, multi-year suspension, intensive supervision; treatment-focused alternatives may be available for eligible defendants.

Felony and Aggravated DUIs

  • DUI Causing Injury (VC §23153): Felony-eligible with potential prison time, victim restitution, and interlock requirements.
  • High BAC, Refusal, or Child Passenger: Enhancements under §23572, §23577, and §23582 add mandatory jail, longer classes, and harsher terms.
  • Fourth DUI (VC §23550): Typically a felony with state prison exposure.

Ignition Interlock Devices (IID)

California’s modern IID framework allows many drivers to keep driving during suspension if they install an approved IID and meet program requirements. Lengths vary by offense and whether there was injury; compliance failures can extend or reinstate suspensions. We help clients choose approved providers and complete court and DMV paperwork correctly the first time.

Collateral Consequences

  • License and Insurance: Administrative suspensions, SR-22 insurance proofs, and steep premium increases.
  • Employment: Commercial drivers face career-ending consequences; many employers act on background checks long before a case is resolved.
  • Immigration and Travel: Certain DUI outcomes can affect admissibility to other countries and create immigration complications.
  • Probation Terms: Zero-tolerance alcohol conditions, search terms, and program compliance requirements.



DUI Manslaughter and “Watson” Murder in Fullerton, CA

When a DUI results in a fatality, the charge depends on the driver’s mental state and history. California distinguishes between vehicular manslaughter while intoxicated and gross vehicular manslaughter while intoxicated; in specific circumstances, prosecutors may file second-degree “Watson” murder.

  • PC §191.5(b): Manslaughter while intoxicated without gross negligence (wobbler; up to 4 years on a felony).
  • PC §191.5(a): Gross vehicular manslaughter while intoxicated (4, 6, or 10 years; higher with priors or multiple victims).
  • PC §187 (Watson): Second-degree murder when implied malice is alleged, often after a prior DUI conviction and advisement; 15 years to life.

These cases require immediate investigation, accident reconstruction, toxicology review, and careful handling of statements and media attention. Early legal intervention can shape how charges are evaluated and filed.


Defending a DUI Charge in Fullerton, CA

No two DUIs are identical. The viability of defenses turns on the stop, the testing method, timing, and the paper trail behind the evidence. Our Fullerton, CA DUI defense lawyers start by freezing the moving pieces: demanding discovery, securing video, and preserving the blood sample for independent testing.

Common DUI Defenses

  • Illegal Stop or Arrest: If the detention lacked reasonable suspicion or the arrest lacked probable cause, suppression may follow.
  • Checkpoint Defects: Sobriety checkpoints must follow constitutional planning and signage standards; deviations can invalidate arrests.
  • Title 17 Violations: California regulations govern instrument calibration, maintenance, observation periods, and blood draw procedures; non-compliance undermines results.
  • Rising BAC / Timing: Alcohol absorption means BAC can increase after driving; the key moment is at the time of driving, not the time of testing.
  • Physiological Factors: GERD/acid reflux, mouth alcohol, ketosis/diet, dental work, or temperature can distort breath results.
  • Bad Science / Paperwork: Calibration logs, chain of custody, and lab uncertainty ranges often reveal reasonable doubt.

Independent Investigation

  • Video Evidence: Body-worn and dash-cam footage to verify driving, instructions, and FST performance.
  • Instrument & Lab Records: Maintenance, accuracy checks, analyst notes, and sample handling.
  • Blood Retesting: Independent toxicology for BAC and potential contaminants; re-analysis can differ from state lab results.
  • Witness Statements: Civilian witnesses, bartenders/servers, or passengers who can clarify time of last drink and demeanor.

In Fullerton, our DUI defense lawyers also scrutinize checkpoint operations and saturation patrol reports closely. If the agency failed to follow required planning or neutral stopping patterns, we move to suppress.


Fullerton, CA DMV Hearings and License Protection

Requesting a DMV hearing within the 10-day window preserves your chance to fight the administrative suspension. DMV hearings are not criminal trials; they’re rule-driven proceedings before hearing officers focused on three main issues for alcohol cases: whether the officer had lawful cause to stop/arrest, whether you were driving, and whether your BAC was 0.08%+ at the time of driving (or whether you refused a lawful test).

  • Strategy: Subpoena the officer and the breath/blood records; challenge admissibility and reliability; raise timing defenses.
  • Outcomes: Set-aside (win) keeps your license pending the court case; loss triggers suspension, though IID options may allow continued driving.
  • Coordination: We synchronize DMV and court strategy so one proceeding doesn’t undercut the other.

Plea Options, Diversion, and Alternative Sentencing in Fullerton, CA DUI Cases

Not every case should go to trial, but every case must be ready for trial to negotiate from strength. Depending on facts and history, outcomes can include:

  • Charge Reductions: Wet reckless, dry reckless, or exhibition of speed to reduce license and custody exposure.
  • IID-Focused Sentences: Keep driving legally while completing classes and probation conditions.
  • Treatment-Oriented Resolutions: For eligible repeat, non-violent offenders, the Orange County DUI Court track emphasizes treatment, testing, and judicial supervision in lieu of lengthy jail.
  • Jail Alternatives: Work release, private programs, or structured custody alternatives when appropriate.

DUI Expungement and Record Relief in Fullerton, CA

Many DUI misdemeanors can be dismissed under PC §1203.4 after successful completion of probation, which helps with most private-sector background checks. Felony DUIs may be eligible for reduction to misdemeanors in limited cases. Record-relief rules are technical; we evaluate eligibility and file the right petitions at the right time.

What to Look for in a Fullerton, CA DUI Lawyer

  • Court + DMV Experience: Your attorney must handle both tracks expertly and on deadline.
  • Local Knowledge: Familiarity with Fullerton PD reports, checkpoint practices, and the North Justice Center calendar helps anticipate problems before they arise.
  • Technical Literacy: Breath machine science, blood toxicology, and Title 17 aren’t optional in modern DUI defense.
  • Access to Experts: Toxicologists, accident reconstructionists, and former lab analysts add real leverage.
  • Communication: Clear timelines, prompt updates, realistic expectations.

Why Choose the Law Offices of David S. Chesley for Your DUI Defense in Fullerton, CA?

When your freedom and reputation are on the line, the experience of your defense team makes the difference. At the Law Offices of David S. Chesley, you’re not hiring one lawyer — you’re getting an entire team of former judges, senior district attorneys, and veteran defense attorneys with decades of collective experience fighting cases just like yours.

  • Proven Leadership: Our team includes former judges and senior prosecutors who know exactly how the other side builds its case — and how to dismantle it.
  • Award-Winning Defense: Recognized as one of California’s Best DUI & Criminal Defense Firms for over 10 years, and Clients’ Choice Award winners 15 years running.
  • 24/7 Availability: Criminal charges don’t keep business hours. Neither do we. Our attorneys are available day and night to step in when you need help most.
  • Team-Based Strategy: Every case is reviewed by multiple attorneys to build the strongest possible defense from every angle.
  • 50+ Years of Combined Experience: We’ve handled thousands of criminal cases across California — from misdemeanors to major felonies — with a track record of dismissals, reductions, and acquittals.

When your future is at stake, don’t face the system alone. Contact our Fullerton office today for a free, confidential consultation — and get a defense team that knows how to win.



Frequently Asked Questions

What happens to my license after a DUI arrest?

The officer issues a temporary license and forwards the suspension paperwork to the DMV. You generally have 10 days to request a hearing. If you win, your license is reinstated pending the court case; if you lose, an IID may allow continued driving.

Can I refuse the breath or blood test?

Yes. Before arrest, adults can usually decline the handheld PAS test; however, after a lawful arrest, refusing a chemical test leads to mandatory penalties, longer suspensions, and enhanced jail exposure. Under-21 or DUI-probation drivers have stricter rules.

Is a DUI a misdemeanor or a felony?

Most first, second, and third DUIs are misdemeanors. A fourth within 10 years, a prior felony DUI, or DUI causing injury can be charged as felonies. Fatalities can trigger manslaughter or “Watson” murder charges.

Will I need an ignition interlock device?

Often yes. California’s IID program lets many drivers keep driving during a suspension. Length depends on the offense and whether injury occurred. Proper installation and compliance are critical.

How long will a DUI stay on my record?

DUI priors count for 10 years for sentencing. Separate from court, insurance and background-check impacts vary. Some convictions can be dismissed under PC §1203.4 after probation, which helps with most private-sector employment checks.

How soon should I hire a lawyer?

Immediately. The DMV deadline is measured in days, and early defense work preserves evidence, secures video, and can change charging decisions.


Contact a DUI Lawyer in Fullerton, CA

A DUI accusation doesn’t have to derail your life. The Law Offices of David S. Chesley's Fullerton, CA criminal defense lawyers defend drivers across Fullerton and Orange County in both court and DMV proceedings. We move quickly to request your hearing, analyze the science, and build the strongest path to dismissal, reduction, or a resolution that protects your license and your future.

Call (714) 770-8738 or reach out online for a free, confidential consultation with a Fullerton DUI defense attorney today.

Areas We Serve

Recent Results

  • Our client faced multiple serious charges in Los Angeles County, including Penal Code § 211 (Robbery), § 245(a)(1) (Assault with a Deadly Weapon), and § 245(a)(4) (Assault with Force Likely to Cause Great Bodily Injury). Unlike a co-defendant represented by another firm who pled to a felony conviction with a "strike," our legal team pursued a different strategy. Through the submission of a comprehensive mitigation package to the District Attorney, we successfully negotiated a complete dismissal of all charges.
  • Our client faced serious charges under Penal Code section 211 for alleged felony robbery involving force and fear in Riverside County (Murrieta Court) . The prosecution argued that probation was not appropriate due to our client’s prior felony convictions in San Bernardino County, including a previous robbery in April 2021 and grand theft in November 2019. Despite the severity of these allegations, our legal team successfully demonstrated insufficient evidence during the preliminary hearing. As a result, all charges were dismissed. This outcome allowed our client to move forward without the burden of a new conviction.
  • Multiple defendants each facing 7 years charged with smuggling prescription drugs into California from Mexico. Our client was the only defendant who received NO JAIL TIME!
  • Client facing 5 years for possession of deadly weapon we negotiated a plea for NO JAIL TIME!
  • Client facing 3 life terms for multiple felony counts of Child Molestation and Sodomy with child we proved the charges were fabricated by victim's mother DISMISSAL of all charges at preliminary hearing!
  • Strike case: Client charged with possession of methamphetamine facing 25 years we filed a Romero Motion which was granted case REDUCED TO MISDEMEANOR!
  • Client's estranged girlfriend alleged Client broke into her room and choked her facing 14 years in State Prison we won at trial JURY ACQUITTAL.
  • Police allegedly discovered 3 bags of marijuana in client's glove box faced 6 years we filed a 1538.5 motion to suppress resulting in DISMISSAL of all charges!

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