Experienced DUI Defense Attorney Backed by Dedicated Industry Experts

Expert Profiles


Alan McCann

Alan McCann was a member of the San Francisco Police Department for 33 years and has more than a decade's worth of experience as an investigator. He is well-trained in accident investigation and reconstruction and has conducted more than 1,000 DUI investigations. Mr. McCann holds certificates in basic, intermediate, and advanced POST (Peace Officer's Standards and Training). Furthermore, the San Francisco Police Department awarded him the highest honor, the Gold Medal of Valor.

Hallee Weingartenundefined

Forensic toxicologist, Halle Weingarten, formerly headed the DUI break alcohol testing program at the Santa Clara County Crime Laboratory. She has trained police officers how to properly use the breath testing devices employed in DUI investigations, and was responsible for maintaining the devices used in Santa Clara County.

She has qualified as an expert in DUI cases in California Superior Courts and her articles have been published in scientific journals. Furthermore, Ms. Weingarten is a lecturer and teacher to other scientists regarding the field of forensic toxicology.

Paul Cavalleroundefined

Investigator Paul Cavallero has conducted more than 200 DUI investigations and regularly testifies in court as a witness on behalf of our clients. As a member of our firm for more than 7 years, he is responsible for gathering client discovery, filing and serving client motions in all Bay Area county courthouses, and photographing areas where clients' were stopped by police officers.

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.”


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


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

    R.R., Attorney at Law

Contact Us Today

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