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Frequently Asked Questions

What is driving under the influence?

Driving under the influence is when a person illegally operates a motor vehicle while under the influence of drugs, alcohol, or both.

How is my blood alcohol concentration determined?

When a person is arrested for DUI, law enforcement will ask them to submit to a blood alcohol test to determine his/her blood alcohol concentration. Your blood alcohol concentration results can be determined through the administration of a breath test, blood test, or urine test.

What is California's blood alcohol limit?

In California, any person who operates a motor vehicle with a BAC of 0.08% or higher is considered above the legal blood alcohol limit.

What happens if I have committed multiple DUI offenses?

If you have been charged with multiple DUIs, your charges will be enhanced. If convicted of multiple DUI, your legal punishments may be enhanced as well. This means you may be subject to lengthier jail time, larger fines, and longer probation terms.

What are field sobriety tests?

Field sobriety tests (FST) are tests that are administered by law enforcement to determine a person's level of intoxication. In California, field sobriety tests are voluntary, which means you can refuse to take them when asked by law enforcement.

Why should I hire a DUI attorney?

When you have been charged with DUI, you need the expert representation of a DUI attorney. Unlike other criminal defense attorneys, a DUI attorney understands and has experience with specifically DUI law. A DUI attorney can evaluate your case, inform you of your rights, investigate the facts surrounding your case, and challenge evidence presented by state prosecutors. When it comes to defending your DUI, the risks are far too great to be without the representation of a skilled attorney.

San Mateo DUI Defense Attorney

The Law Office of Robert Tayac has helped countless clients fight their San Mateo DUI charges. With years of trial and DUI litigation experience, Attorney Robert Tayac has the skill and legal expertise it takes to successfully contest his clients' DUI charges. Whether your are a first time offender or a multiple DUI offender, you can be assured that Mr. Tayac will put every effort into helping you avoid a criminal conviction.

Any person who drives under the influence of drugs and/or alcohol places his/her life and others in great danger. For this reason, California has adopted strict DUI laws and legal penalties. If a person is convicted of driving under the influence in San Mateo County, he/she faces life-altering legal punishments such as jail time, fines, probation, license suspension, and vehicle impoundment. When you are charged with DUI, you need the counsel of an experienced San Mateo attorney to increase your chances of winning in court.

Contact the Law Office of Robert Tayac for your free DUI case evaluation!

Why Choose Our Firm?

Attorney Robert Tayac Puts a Long, Decorated Career to Work for You
  • Puts Over 20 Years of Experience Toward Your Case

  • Specialized Education in DUI Defense

  • Has Trained Other Attorneys in San Francisco

  • Former San Francisco Police Officer & Police Inspector

  • Certified by the SFPD on the Intoxilyzer 5000 Testing Device

  • Co-Authored the 4th Edition of California Drunk Driving Defense

  • Boasts a Successful Record Achieving the Best Result for His Clients

  • Takes the Time to Understand You & Your Case

Client Testimonials

  • “His in depth knowledge and expertise within his field, along with deep and lasting relationships with the District Attorneys office and everyone involved are without a doubt unmatched.”


  • “These clients have called me to thank me for referring them to the Law Offices of Robert Tayac.”

    R.R., Attorney at Law

  • “Without Mr Tayac's knowledge and drive to succeed, I most likely would not be able to write this review today.”


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