San Mateo Criminal Defense Attorney – DefendCA

Charged in San Mateo? Every hour matters. Attorney Thomas Greenberg
former San Mateo County Deputy Public Defender knows how prosecutors build their cases,
and he uses that inside knowledge to defend yours. Free consultation. Available 24/7.

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Top Rated Criminal Defense Attorneys

Recognized for excellence in criminal defense representation

Over 20 Years of Experience in San Mateo

Deep knowledge of local courts and legal procedures

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Trusted by clients and recognized by industry professionals

Experienced criminal defense

San Mateo Criminal Defense Attorney Who Knows Both Sides of the Courtroom

Most defense attorneys only know how to react to a prosecutor's case. Thomas Greenberg spent years as a San Mateo County Deputy Public Defender he knows exactly how the DA's office thinks, what evidence they prioritize, and where their cases are weakest. That insider knowledge is the edge your defense needs.

San Mateo city cases are heard at the San Mateo County Superior Court Southern Branch (Hall of Justice), 400 County Center, Redwood City a courthouse Thomas has appeared in for over 20 years. Whether you're facing a first-time DUI, domestic violence charges, a drug offense, or a serious felony, DefendCA provides genuinely personalized defense you work directly with Thomas, not a junior associate. From the moment you call, we work to protect your freedom, your professional license, and your future. Learn how the criminal process works in California →

Criminal Defense Services for San Mateo Clients

DUI Defense

DUI arrests along the US-101, Highway 92, and Hillsdale Boulevard corridors are common in San Mateo and the consequences are severe. Thomas challenges every aspect of your case: the legality of the traffic stop, the accuracy of the breathalyzer or blood test, and whether proper protocols were followed. We also fight to protect your driving privileges in DMV hearings. A DUI conviction affects your job, insurance, and record act immediately.

Domestic Violence Defense

A domestic violence arrest in San Mateo can trigger a mandatory restraining order, a 52-week batterer's program, loss of firearms rights, and serious damage to child custody arrangements even before trial. Thomas has handled DV cases at both the Redwood City and South San Francisco courthouse. He investigates false accusations, Miranda violations, and lack of evidence to build the strongest possible defense for your specific situation.

Drug Crimes Defense

Drug charges in California range from simple possession (PC 11350) to sales, trafficking, and manufacturing each carrying dramatically different penalties. Thomas evaluates whether the search and seizure that led to your arrest was lawful, challenges lab evidence, and pursues diversion programs and treatment alternatives wherever possible. Many drug clients avoid jail time entirely. Don't accept a conviction without exploring every option.

Theft & Burglary Defense

For San Mateo's large population of tech workers, nurses, and licensed professionals, a theft conviction does more than mean fines or jail it can permanently revoke your professional license. Thomas fights to minimize or eliminate theft charges, pursue diversion programs, and negotiate outcomes that protect your livelihood. From petty theft to grand theft and commercial burglary, we build your defense around what matters most to you.

Probation Violations

A probation violation in San Mateo County can land you in jail faster than the original charge the standard of proof is lower, and judges have wide discretion. Whether you missed a check-in, failed a drug test, or picked up a new charge, Thomas moves quickly to request a hearing before a warrant is issued and argues for alternatives to incarceration. Early action is the difference between jail time and continued probation.

Expungement Services

A criminal record shouldn't define the rest of your life. Under California Penal Code Section 1203.4, many convictions can be dismissed from your record unlocking better employment, housing, and professional licensing opportunities. Thomas evaluates your full record, identifies every conviction eligible for expungement, and handles the entire court process. San Mateo County employers and landlords do background checks clear your record and move forward.

Why San Mateo Residents Choose DefendCA

Former San Mateo County Deputy Public Defender Thomas knows exactly how the DA's office builds its cases
You work directly with Thomas not a paralegal or junior associate who doesn't know your case
Proven results: dismissals, reductions, and acquittals across DUI, DV, drug, and felony cases
Free consultation, transparent fees, and 24/7 availability including virtual meetings
20+ years of appearances in San Mateo County courts Southern Branch and Northern Branch (South San Francisco)
Office at 605 Middlefield Road, Redwood City minutes from the Hall of Justice where your case will be heard
Defends your professional license critical for San Mateo's tech, medical, and licensed professionals
UC Berkeley graduate, A+ BBB rating, and recognized by Super Lawyers

What Our San Mateo Clients Say

I was arrested on a DUI coming off the 101 near Hillsdale and genuinely thought my nursing career was over. Thomas got the charge reduced before it ever went to trial. He was upfront about what to expect at every stage and never made me feel like just a case number. I still have my license."

Maria T.
Registered Nurse San Mateo

My ex made a false domestic violence accusation during our custody dispute. I was terrified of what a conviction would mean for my kids. Thomas went through every piece of evidence, exposed the inconsistencies in her statements, and the charges were fully dismissed at the Redwood City courthouse. I can't put a price on that outcome."

David R.
San Mateo County Client

FAQs

Frequently Asked Questions About Criminal Defense in San Mateo

No — this is the most important thing to get right. Under the Fifth Amendment, you have the right to remain silent. Anything you say to San Mateo Police or San Mateo County deputies can be documented and used against you in court. You are not required to explain yourself or provide an alibi. Simply state: "I am invoking my right to remain silent and I want an attorney." Then call DefendCA at (650) 242-0021. The first hours after arrest are critical — what you say can make or break your case.

San Mateo city cases are heard at the San Mateo County Superior Court Southern Branch — the Hall of Justice — at 400 County Center, Redwood City, CA 94063. Cases from the northern part of the county (Daly City, South San Francisco, Millbrae, Burlingame) go to the Northern Branch in South San Francisco. Thomas Greenberg has appeared regularly at both courthouses for over 20 years and knows the local prosecutors, judges, and procedures at each location intimately.

Arraignment is your first formal court appearance — typically within 48–72 hours of arrest for those in custody. The judge reads the charges, you enter a plea, and bail is set or reviewed. This is a critical stage: how your attorney responds at arraignment can shape the entire trajectory of your case. Thomas attends arraignments and, in many misdemeanor cases, can appear on your behalf so you do not have to miss work or school.

Yes — and it happens more often than most people expect when the right attorney is involved early. Charges can be dismissed when evidence was illegally obtained, when constitutional rights were violated during the arrest, or when witness accounts are inconsistent. Many charges are reduced through negotiation, especially when the evidence is weak or the defendant has no prior record. San Mateo County also offers diversion programs for certain first-time offenders that can result in full dismissal after program completion. Contact us for an honest, case-specific assessment.

Yes — and this is something many attorneys overlook entirely. California's licensing boards for nurses, doctors, teachers, contractors, real estate agents, and other licensed professionals can investigate, suspend, or revoke your license based on a criminal conviction, even a misdemeanor. San Mateo is home to a large workforce of licensed professionals. Thomas factors the licensing implications of any potential conviction into your defense strategy from the very first consultation, because protecting your record means protecting your career.

Yes. Misdemeanor convictions in California carry real consequences: up to one year in county jail, fines, probation, mandatory programs, and a permanent criminal record visible to employers, landlords, and licensing boards. An experienced attorney frequently negotiates outcomes — diversion, reduced charges, or outright dismissals — that an unrepresented defendant would never obtain. Never face even a misdemeanor without legal counsel in your corner.

Many convictions in California are eligible for expungement under Penal Code Section 1203.4. Once granted, the conviction is dismissed from your record for most employment and licensing purposes. You must have completed probation and have no current charges pending. Certain serious convictions are not eligible. Thomas reviews your full record, identifies everything that qualifies, and manages the entire petition process at the San Mateo County Superior Court — giving you the clean slate you deserve.
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Client Results

Felony DUI Reduced to Misdemeanor

DUI Charge Dismissed Client Kept Nursing License

A San Mateo RN was arrested for DUI near the Hillsdale corridor with a BAC reading over the legal limit. A conviction would have triggered a mandatory BRN report and likely cost her nursing license. Thomas identified procedural errors in the breathalyzer calibration records and challenged the lawfulness of the initial traffic stop. The charge was dismissed before trial and the client kept her career.

Domestic Violence Felony Reduced No Jail Time

A San Mateo County client faced felony domestic violence charges that carried potential state prison time, a lifetime firearms ban, and a 52-week batterer's program. Thomas reviewed the police report, identified inconsistencies in the alleged victim's statements across multiple interviews, and successfully negotiated a reduction to a misdemeanor with no jail time and no felony on his record protecting his job and custody rights.

Domestic Violence Charges Dismissed
READ MORE RESULTS

Comprehensive Criminal Defense Services

Our Attorney Proudly Serves in

Belmont, CA, USA
Atherton, CA, USA
Saratoga, CA, USA
Woodside, CA, USA
Cupertino, CA, USA
Los Altos, CA, USA
Los Gatos, CA, USA
Palo Alto, CA, USA
San Mateo, CA, USA
Menlo Park, CA, USA
San Carlos, CA, USA
Redwood City, CA, USA
Mountain View, CA, USA
East Palo Alto, CA, USA
Los Altos Hills, CA, USA
North Fair Oaks, CA, USA
San Mateo County, CA, USA
Emerald Hills, CA, USA
West Menlo Park, CA, USA

Why DefendCA?

The Insider Advantage: Thomas Has Sat on the Other Side of the Table

Before founding DefendCA, Thomas Greenberg served as a San Mateo County Deputy Public Defender. He spent years inside the system reviewing the same evidence prosecutors rely on, watching how law enforcement builds cases, and learning exactly where charges are strong and where they fall apart. That experience is not something you can replicate with years of defense work alone. It is a genuine, structural advantage for every San Mateo client he represents.

Top Rated Criminal Defense Attorney In San Mateo & Santa Clara Counties

Unmatched Local Court Knowledge

Thomas has appeared at both San Mateo County courthouses the Southern Branch in Redwood City and the Northern Branch in South San Francisco for over two decades. He knows the prosecutors, understands the judges' tendencies, and has navigated thousands of cases through this specific court system. Generic Bay Area experience is not the same as deep, case-tested familiarity with San Mateo County courts.

Personalized Legal Strategies

Your Rights Are the Foundation of Your Defense

Every defense starts with one question: did law enforcement follow the rules? Thomas scrutinizes every arrest for Fourth Amendment violations (unlawful search and seizure), Fifth Amendment violations (failure to advise Miranda rights), and procedural errors in how evidence was collected and handled. When your constitutional rights were violated, the evidence that follows can often be suppressed and suppressed evidence frequently leads to dismissed charges.

Expertise in Criminal Defense

No Template Defenses. Every Case Is Built from Scratch.

Many law firms run the same defense playbook for every client. Thomas doesn't. He reviews the evidence specific to your arrest, identifies the weakest points in the prosecution's case, and builds a strategy around your individual circumstances including your profession, your family situation, and what outcome matters most to you. Some clients need a full dismissal. Others need a reduction that preserves a professional license. Your defense reflects your priorities.

Compassionate Advocacy

Direct Access to Thomas Not a Rotating Door of Assistants

At large multi-attorney firms, you often meet a partner at the first consultation and then get handed off to a junior associate or paralegal for the actual work. At DefendCA, Thomas handles your case personally from the first call to the final court appearance. You will always know what is happening with your case, and you will always have direct access to the attorney who knows it inside and out.

Aggressive Defense Tactics

When Everything Is on the Line, Experience and Location Matter

Thomas Greenberg is a UC Berkeley graduate who has spent his entire legal career in San Mateo County. His office at 605 Middlefield Road in Redwood City is minutes from the Hall of Justice. He appears at the San Mateo County Superior Court regularly not occasionally. When your job, your family, your professional license, and your freedom are at risk, you need an attorney who has spent two decades in the exact courthouse that will decide your case. That is DefendCA. Call today for a free consultation: (650) 242-0021.

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In most cases, time is not on your side. You need someone to fight for your rights today. We welcome the opportunity to speak to you regarding your case.

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