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Over 40 Years of Defending Orange County Drivers


Tustin DUI lawyer Barry T. Simons has spent the last 40 years fighting for the rights of drivers in Orange County courts. He is a nationally recognized expert in DUI Defense and is co-writer of California Drunk Driving Law, which has been acknowledged by thousands of California attorneys and judges as “The Bible of Drunk Driving Defense.”

Mr. Simons is also a Founding Member, Fellow, and former Dean of the National College for DUI Defense (NCDD). He has successfully challenged both trial and appellate court decisions on issues involving Preliminary Alcohol Screening (PAS) Test devices, DUI Roadblocks, refusals to take chemical tests, and DMV practices and procedures. 

Barry T. Simons has presented his cases and lectured at DUI Seminars for DUI attorneys around the country on a variety of subjects, including scientific evidence, legal motions, and the interstate implications of DUI license suspensions.

Mr. Simons has been awarded the peer review rating of AV (“very high to preeminent” legal ability and ethics) by the Martindale-Hubbell International Law Directory and has been selected as a Superlawyer in DUI Defense for Southern California. Mr. Simons has also been given the title of “Top-Rated DUI Lawyer” by OC Metro Magazine. Mr. Simons is rated 10.0/10.0 in DUI Defense (Highest Rating) from AVVO, a lawyer rating service.

In 1998, Tustin DUI attorney Barry Simons established relaxed standards at DMV Hearings to challenge alcohol-testing procedures in DUI cases. In 1999, he forced the DMV to announce that they would cancel 4,700 drunk-driving suspensions after he exposed the Orange County Crime Lab’s use of unapproved breath testing machines in Trautman v DMV. In 2002, Mr. Simons exposed the O.C. Crime Lab’s use of unapproved blood testing methods between 1996 and 2002 (Bite v Gourley), invalidating blood test suspensions for all of his clients during that period.  

As a leading DUI attorney, Mr. Simons is among a small number of lawyers in the state of California who carry Board Certification in DUI Defense under the standards certified by the American Bar Association (ABA).

Ten (10) Ways to Discredit Field Sobriety Tests

  • The officer was not properly trained
  • The officer did not use standardized NHTSA tests
  • The officer did not property instruct you on how to perform tests
  • The officer did not use objective standardized scoring equipment
  • Field Sobriety Tests are not scientific 
  • The officer had you perform the tests under improper conditions
  • Your age or weight make you an improper candidates for tests
  • You have physical disability that makes you an improper candidate for tests
  • The officer lied about your performance on tests

Committed to Defending Your DUI Charge

Mr. Simons and his team of DUI attorneys in Tustin understand the complex scientific principles associated with defending against a DUI charge. Each lawyer in our firm is a member of, or has graduated from, the National College of DUI Defense and is committed to analyzing, reviewing, and addressing all of the legal, factual, and scientific issues and defenses that may surface in your Tustin DUI case.

The Law Office of Barry T. Simons is a team of first-rate DUI lawyers trained specifically in DUI defense, two specially trained paralegals, and a collaboration of investigators, criminalists, and forensics toxicologists. Our team of skilled, dedicated DUI attorneys has taught and written extensively on the law and science of DUI and represents the most respected and the most recognized DUI Defense attorneys in Orange County and throughout the State of California.

Some of the cases that our DUI lawyers in Tustin have successfully defended include:

DUI Drugs

Prior Conviction

DUI Issues for Women

Field Sobriety Tests

Out-of-State Licensing Issues

DUI Injury /Manslaughter

Each of our DUI attorneys is committed to working in conjunction with top experts in the fields of Forensic Toxicology and Pharmacology in order to analyze and determine the important scientific issues and defenses of your DUI case.

They have challenged trial and appellate courts to DUI Roadblocks, DMV procedures and practices, and Preliminary Alcohol Screening (PAS) Tests, and they will fight to help prevent the suspension of your driver’s license.

The Law Office of Barry T. Simons offers clients dedicated professional representation and defense of those accused of driving under the influence of alcohol/and or drugs. Our mission is to provide you with a highly competent DUI defense that wins in court and at DMV.