Merced County DUI Lawyer

DUI Defense in Merced and Los Banos

A DUI arrest in Merced County may threaten your driver’s license, employment, professional licensing, finances, and freedom. It may also create two separate legal proceedings with different deadlines and decision-makers:

1. A criminal case in the Merced County Superior Court
2. An administrative driver’s-license proceeding before the California Department of Motor Vehicles

Tai C. Bogan is a California State Bar Certified Criminal Law Specialist who has practiced criminal defense since 2006. He represents clients accused of alcohol-related DUI, drug DUI, marijuana DUI, prescription-medication DUI, refusal allegations, multiple-offense DUI, and felony DUI throughout Merced County.

Attorney Bogan personally reviews the evidence, directs the defense strategy, handles material negotiations, and oversees the preparation and presentation of the defense.

Depending upon the needs of the case, The Bogan Law Firm may bring experienced contract attorneys, paralegals, investigators, and expert witnesses onto the defense team. No matter who joins the team, Attorney Bogan remains responsible for leading the defense and making the critical strategic decisions.

The client always makes the final decision about whether to accept a negotiated disposition or proceed to trial.

Yes—Attorney Bogan Will Be Personally Involved in Your Case. Learn How We Handle Your Defense.

🏆 Why Clients Choose The Bogan Law Firm for DUI Defense

• ✅ California State Bar Certified Criminal Law Specialist
• ✅ Criminal and DUI defense practice since 2006
• ✅ More than 500 contested proceedings
• ✅ AV Preeminent® Rated, 2020–2026
• ✅ Northern California Super Lawyers® Selection, 2019–2025
• ✅ Personally led DUI defense strategy
• ✅ Representation in both the criminal case and DMV proceeding
• ✅ Careful review of breath, blood, video, and police evidence
• ✅ Trial preparation when an acceptable resolution cannot be reached

No attorney can guarantee the outcome of a DUI case. Every case depends upon its individual facts, evidence, testing procedures, driving history, applicable law, prosecutor, DMV hearing officer, and court.

🚗 The 10-Day DMV Hearing Deadline: How to Request a Hearing

A DUI arrest can trigger a DMV administrative case that is separate from the criminal court case.

You generally have only 10 days after receiving notice of the proposed suspension or revocation to request a DMV hearing. If DMV mailed the notice, the applicable period may be 14 days from the date of the notice. Review your notice immediately because the deadline stated in the notice controls.

DMV administrative hearing requests are handled by the DMV Driver Safety Branch—not an ordinary local DMV field office where people renew their licenses or handle vehicle registration. A field office generally cannot schedule an administrative hearing or ensure that your hearing rights are preserved. Do not rely on a visit to a local field office as proof that a hearing was requested. Submit the request through the official Driver Safety Portal or contact the Driver Safety Branch directly, and retain confirmation that DMV received it.

You can request a hearing through the California DMV’s Driver Safety Portal or call DMV Driver Safety at (833) 543-7703.

Through the online portal, select the option for a DUI-related hearing and provide the requested information. Your request is not complete until DMV confirms that it was received. Save the confirmation. If you do not receive confirmation, contact Driver Safety immediately.

Do not wait for your first criminal court date. The DMV deadline may expire before that court appearance.

🚗 The DMV Proceeding

The DMV proceeding concerns the person’s driving privilege. Depending upon the allegations, the issues may include:

• Whether the officer had reasonable cause to believe the person was driving under the influence
• Whether the arrest was lawful
• Whether a qualifying chemical test showed a prohibited alcohol concentration
• Whether the driver refused or failed to complete a required chemical test
• Whether the officer and laboratory complied with applicable procedures
• Whether the evidence is sufficiently reliable to support the administrative action

⚖️ The Criminal Case

The criminal case concerns whether the prosecution can prove a violation of California’s DUI laws beyond a reasonable doubt.

The criminal court may address:

• Custody or bail
• Arraignment and entry of a plea
• Discovery
• Pretrial negotiations
• Evidentiary motions
• Trial
• Sentencing following a conviction

A DMV hearing officer may set aside an administrative suspension while the criminal prosecution continues. A favorable outcome in court also does not automatically resolve every DMV action.

Do not wait for the first court date before addressing the DMV deadline.

🚘 California DUI Charges

🚘 Driving Under the Influence of Alcohol

Vehicle Code section 23152(a) prohibits driving while under the influence of alcohol.

The prosecution does not necessarily need a chemical-test result of 0.08 percent or higher to pursue this charge. The question is whether alcohol impaired the person’s ability to drive with the caution characteristic of a sober person under similar circumstances.

The prosecution may rely upon:

• Driving pattern
• Physical appearance
• Speech
• Balance and coordination
• Field sobriety tests
• Statements about drinking
• Breath or blood testing
• Officer observations
• Body-camera recordings
• Other witness testimony

Each category of evidence may be challenged.

🧪 Driving With a Blood-Alcohol Concentration of 0.08 Percent or More

Vehicle Code section 23152(b) generally prohibits driving with a blood-alcohol concentration of 0.08 percent or higher.

The prosecution must still establish that the test is reliable and relates back to the time of driving.

Potential issues include:

• Rising blood alcohol
• Time between driving and testing
• Breath-machine maintenance
• Calibration and accuracy
• Observation-period compliance
• Mouth alcohol
• Contamination
• Blood collection and storage
• Laboratory procedures
• Chain of custody
• Measurement uncertainty
• Whether the person was actually driving

A reported number is evidence. It is not beyond challenge merely because it appears in a laboratory report or breath-test record.

💊 Driving Under the Influence of Drugs

Vehicle Code section 23152(f) prohibits driving while under the influence of a drug.

Unlike the 0.08 percent alcohol provision, California generally does not use one universal numerical concentration to establish impairment from every drug. The prosecution must prove that the substance affected the person’s ability to drive with the caution characteristic of a sober person under similar circumstances.

A positive blood result does not necessarily establish impairment at the time of driving. A substance or metabolite may remain detectable after its impairing effects have diminished.

Drug DUI allegations may involve:

• Prescription medication
• Nonprescription medication
• Methamphetamine
• Cocaine
• Marijuana
• Combinations of substances

The defense may examine dosage, timing, tolerance, medical use, toxicology, observed driving, field sobriety testing, and whether the reported symptoms have an innocent explanation.

⚗️Combined Alcohol and Drug DUI

Vehicle Code section 23152(g) addresses driving under the combined influence of alcohol and a drug.

A person may have an alcohol concentration below 0.08 percent and still be prosecuted if the government claims that alcohol and another substance combined to impair driving.

These cases may require separate analysis of the alcohol evidence, toxicology, interaction between substances, and observed driving.

🚘 Marijuana DUI in Merced County

Marijuana DUI cases require more than proof that a cannabinoid was detected.

THC concentration does not translate into impairment in the same direct manner that alcohol concentration is commonly used in alcohol DUI prosecutions. Relevant questions may include:

• When marijuana was last used
• Method of consumption
• Frequency of use
• Whether active THC or inactive metabolites were detected
• The time between driving and blood collection
• Whether the driving pattern demonstrated impairment
• Whether field sobriety tests were properly administered
• Whether fatigue, anxiety, injury, disability, or another condition explains the observations
• Whether the officer was trained to evaluate suspected drug impairment
• Whether the toxicology supports impairment at the time of driving

The defense should examine the complete record rather than assuming that a positive result proves DUI.

🚘 Prescription-Medication DUI

Possessing a valid prescription does not automatically prevent a DUI prosecution. However, the fact that a medication was lawfully prescribed may be important to the factual and medical analysis.

Potential issues include:

• Whether the medication was taken as directed
• Length of time on the medication
• Whether the dosage recently changed
• The prescribing physician’s instructions
• Known side effects
• Whether the person experienced side effects
• Other medical or neurological conditions
• The timing of the dose
• Whether the observed behavior was normal for that individual
• Whether the medication actually impaired driving

The prosecution must prove impairment—not merely that a prescribed medication was present.

🧪 Field Sobriety Tests Are Not Pass-or-Fail Tests

Officers may ask a driver to perform roadside exercises such as:

• Horizontal gaze nystagmus
• Walk-and-turn
• One-leg stand
• Modified position of attention
• Finger-to-nose
• Romberg balance test
• Other divided-attention exercises

Performance may be affected by:

• Uneven or sloped pavement
• Poor lighting
• Traffic
• Weather
• Footwear
• Age
• Weight
• Injury
• Physical disability
• Neurological conditions
• Anxiety
• Fatigue
• Confusing instructions

Body-camera or patrol-car recordings may show whether the officer accurately described the person’s performance.

The police report reflects the officer’s interpretation. The video may provide a more complete picture.

🧪 Preliminary Breath Tests and Chemical Tests After Arrest

California law distinguishes between a preliminary roadside breath test and the chemical test generally required after a lawful DUI arrest.

For many adult drivers who are not on DUI probation, a preliminary alcohol screening test administered before arrest may be optional. Different rules may apply to drivers under 21, drivers on DUI probation, and certain other circumstances.

After a lawful DUI arrest, California’s implied-consent laws generally require the driver to submit to an evidentiary chemical test. Depending upon the suspected substance and circumstances, testing may involve breath, blood, or urine.

A refusal allegation can create consequences separate from the underlying DUI charge. Issues may include:

• Whether the arrest was lawful
• Whether the officer gave the required admonition
• Whether the driver understood the instructions
• Whether the driver actually refused
• Whether a medical condition affected completion
• Whether the driver attempted to cooperate
• Whether the officer improperly treated confusion or hesitation as refusal
• Whether a warrant was obtained
• Whether the blood draw was reasonable

A driver should not assume that every alleged failure to complete a test legally qualifies as a refusal.

🚘 Common DUI Defense Issues

🚔 Was the Traffic Stop Lawful?

An officer generally needs a lawful basis to stop a vehicle. The defense may compare:

• The officer’s report
• Dispatch information
• Body-camera recordings
• Patrol-car video
• Civilian reports
• Traffic-camera or surveillance footage
• The actual requirements of the claimed Vehicle Code violation

If the detention was unlawful, the defense may seek suppression of evidence obtained as a result.

👤 Can the Prosecution Prove Who Was Driving?

In an accident, parked-car, or delayed-contact case, the prosecution may have difficulty proving who operated the vehicle.

Ownership of a vehicle does not necessarily prove who was driving it.

⏱ Was the Alcohol Level Still Rising?

Alcohol is not absorbed immediately. A person’s blood-alcohol concentration may continue to rise after driving has ended.

A later test result does not necessarily establish the person’s alcohol concentration at the time of driving.

🧪 Was the Breath or Blood Test Reliable?

Chemical-test evidence should be examined for:

• Instrument maintenance
• Calibration
• Operator compliance
• Collection procedures
• Sample integrity
• Storage conditions
• Chain of custody
• Laboratory methods
• Quality-control records
• Contamination
• Measurement uncertainty

🎥 Does the Video Match the Police Report?

Body-camera and patrol-car recordings may reveal:

• Normal speech
• Steady balance
• Appropriate responses
• Confusing instructions
• Poor testing conditions
• Inaccurate reporting
• A driving pattern inconsistent with impairment

🩺 Is There an Innocent Explanation?

Fatigue, illness, anxiety, injury, disability, allergies, environmental exposure, and other medical conditions may produce symptoms that officers associate with impairment.

🚘 First DUI Offense

A first DUI is generally prosecuted as a misdemeanor unless the incident involves circumstances supporting a felony charge.

Potential consequences may include:

• Informal probation
• County jail or alternatives to custody
• Fines and penalty assessments
• DUI education
• Driver’s-license suspension or restriction
• Ignition interlock requirements or options
• Restitution
• Increased insurance costs
• Employment or licensing consequences

The exact consequences depend upon the charge, test result, aggravating allegations, driving history, DMV action, and negotiated or trial outcome.

🚘 Second or Multiple DUI Offenses

California generally uses a 10-year period when determining whether a prior DUI or qualifying alcohol-related driving conviction increases the consequences of a new DUI.

A second, third, or subsequent DUI may involve:

• Increased custody exposure
• Longer DUI education
• Longer license suspension or revocation
• Mandatory ignition-interlock requirements in qualifying cases
• More restrictive probation terms
• Greater employment and licensing consequences

A prior conviction should be reviewed rather than automatically accepted as legally valid and usable. The date of the prior offense, nature of the conviction, jurisdiction, and constitutional validity may matter.

🚘 DUI With an Accident or Injury

An accident does not automatically prove DUI, and DUI does not automatically prove that the accused person caused an accident.

The prosecution may need to establish:

• Who was driving
• Whether the driver was under the influence
• Whether the driver committed an additional unlawful act or neglected a legal duty
• Whether that conduct caused injury
• The nature and extent of the injury

The defense may require:

• Accident reconstruction
• Vehicle inspection
• Scene photographs
• Event-data-recorder information
• Surveillance video
• Medical records
• Independent toxicology review
• Witness interviews
• Analysis of comparative fault or intervening causes

An injury-related DUI may be filed as a misdemeanor or felony depending upon the circumstances. These cases require prompt investigation because vehicles may be repaired, video may be erased, and physical evidence may disappear.

⚠️ Aggravating DUI Allegations

Additional consequences may be alleged when a DUI case involves:

• A high reported alcohol concentration
• Chemical-test refusal
• Excessive speed
• Reckless driving
• A collision
• Injury
• A child passenger
• Driving on a suspended license
• Prior DUI convictions
• DUI probation
• Leaving the scene
• Conduct allegedly showing unusual danger

An allegation is not automatically true merely because it appears in the complaint or police report. Each allegation must be supported by admissible evidence.

🚗 The California DMV Hearing

The DMV hearing is an opportunity to challenge the administrative action against the driver’s license. It can also provide an early opportunity to obtain and examine evidence.

Depending upon the case, DMV materials may include:

• Officer’s sworn statement
• Arrest report
• Chemical-test results
• Breath-test records
• Laboratory documents
• Refusal admonition
• Temporary license and suspension notice
• Other supporting reports

A defense attorney may:

• Request a hearing
• Seek a stay when available
• Obtain DMV discovery
• Subpoena relevant records or witnesses when appropriate
• Cross-examine the officer
• Present testimony or documentary evidence
• Challenge the legal and evidentiary basis for the suspension

The issues and available procedures depend upon whether the case involves alcohol, drugs, a refusal allegation, an under-21 driver, DUI probation, or another licensing action.

🚗 Restricted Driving and Ignition Interlock Devices

A driver subject to a DUI-related suspension may have options for restricted driving, depending upon:

• Whether it is a first or repeat offense
• Whether alcohol was involved
• Whether anyone was injured
• Whether the driver submitted to chemical testing
• Whether an ignition interlock device is installed
• Enrollment in a qualifying DUI program
• Filing proof of financial responsibility
• Payment of DMV fees
• Other holds or suspensions on the driving record

California’s statewide ignition-interlock program currently extends through the end of 2032. Repeat and injury-related alcohol DUI convictions may carry mandatory IID requirements. Certain other drivers may elect an IID restriction to obtain broader driving privileges.

The rules are not identical for alcohol DUI, drug-only DUI, and refusal cases. Eligibility should be evaluated individually.

🚘 Merced County DUI Court Locations

Court information last reviewed August 2026. Locations, hours, parking, and departmental assignments may change. Confirm current information with the Merced County Superior Court before appearing.

🏛Charles James Ogletree Jr. Courthouse

Superior Court of California, County of Merced
2260 N Street
Merced, CA 95340
Telephone: (209) 725-4100

The Ogletree Jr. Courthouse—also called the N Street Building—currently houses Courtrooms 1 through 7 and handles criminal proceedings.

The Old Merced Courthouse at 627 W. 21st Street primarily handles civil, probate, and administrative matters. Carefully check the address on the court notice to avoid going to the wrong building.

🅿️ Parking and Security

The court provides directions to courthouse parking accessible from the Merced court campus near 22nd and N Streets.

Allow enough time to park, pass through security, locate the assigned courtroom, and meet with counsel. Visitors are subject to security screening, and bags or other containers may be inspected or x-rayed.

Check Current Merced Courthouse Information

🏛Robert M. Falasco Justice Center — Los Banos

Superior Court of California, County of Merced
1159 G Street
Los Banos, CA 93635
Telephone: (209) 725-4124

The Robert M. Falasco Justice Center currently houses Courtrooms 12 and 13 and handles criminal and traffic proceedings along with other matters.

🅿️ Parking and Security

Parking is available in the courthouse lot.

Visitors pass through a metal detector, and bags, briefcases, backpacks, and other containers may be x-rayed. Allow additional time for parking and security screening.

Check Current Los Banos Courthouse Information

📍 DUI Arrests Throughout Merced County

The Bogan Law Firm represents clients whose DUI arrests arise throughout Merced County, including:

• Merced
• Los Banos
• Atwater
• Livingston
• Dos Palos
• Gustine
• Winton
• Delhi
• Hilmar
• Planada
• Le Grand
• Santa Nella
• Interstate 5
• Highway 99
• Highway 140
• Highway 152
• Other Merced County roads and communities

Investigating agencies may include:

• California Highway Patrol
• Merced Police Department
• Merced County Sheriff’s Office
• Los Banos Police Department
• Atwater Police Department
• Livingston Police Department
• Dos Palos Police Department
• Other local, state, or federal agencies

The Bogan Law Firm primarily practices in Stanislaus, San Joaquin, Merced, and Tuolumne Counties. Cases outside the firm’s primary geographic area are considered individually based upon their seriousness, complexity, and particular needs.

👤 How Attorney Bogan Approaches a DUI Case

🔍 Personally Reviews the Evidence

Attorney Bogan personally reviews the police reports, body-camera recordings, patrol-car video, breath records, blood evidence, witness statements, DMV documents, and other available discovery.

🧭 Directs the Defense Strategy

The defense strategy may involve factual investigation, suppression issues, toxicology, DMV litigation, expert analysis, negotiations, trial preparation, or a combination of approaches.

Attorney Bogan directs that strategy and makes the critical strategic decisions for the defense team.

🤝Personally Handles Material Negotiations

Attorney Bogan personally addresses material negotiations on the client’s behalf. Those negotiations may concern dismissal, reduction of charges, sentencing alternatives, treatment, custody alternatives, or another resolution appropriate to the individual case.

🛡Prepares for Contested Proceedings

When necessary, DUI representation may involve:

• DMV administrative hearing
• Suppression motion
• Evidentiary hearing
• Motion concerning chemical-test evidence
• Court trial
• Jury trial

Attorney Bogan has handled more than 500 contested proceedings and remains available to conduct the trial if the client chooses to proceed to trial.

👥 Leads the Defense Team

A DUI case may require investigators, toxicologists, accident-reconstruction experts, medical experts, paralegals, or additional attorneys.

No matter who joins the team, Attorney Bogan remains responsible for leading the defense, reviewing the evidence, directing the strategy, overseeing preparation, and making the critical strategic decisions.

Learn More About How We Handle Your Case

❓ Frequently Asked Questions

What Should I Bring to My DUI Consultation?

If available, bring:

• Citation or release paperwork
• Temporary license or suspension notice
• Court notice
• Tow paperwork
• Bail documents
• DMV correspondence
• Photographs or videos
• Prescription information
• Medical information relevant to testing or observations
• Witness names and contact information
• A timeline of food, alcohol, medication, and driving
• Employment or professional-license information

Do not alter, delete, or post potentially relevant evidence online.

📞 Speak With a Merced County DUI Attorney

A DUI arrest does not determine guilt. The prosecution must prove every required element, and the DMV must establish a legal basis for its administrative action.

Breath results, blood results, field sobriety tests, police reports, and officer opinions can all be examined and challenged when supported by the facts and law.

If you were arrested for DUI in Merced, Los Banos, or elsewhere in Merced County, act promptly. The deadline to request a DMV hearing may arrive long before the first court appearance.

Call The Bogan Law Firm at (209) 565-3425.

Learn How Attorney Bogan Will Be Personally Involved in Your Defense

Visit the California DUI Defense Hub

Visit the Merced County Criminal Defense Page

Learn What Happens Before Criminal Charges Are Filed