Petition to Seal Arrest and Related Records. CR-409-INFO, Information on How to File a Petition to Seal Arrest and Related Records.We usually respond in 5 minutes. These operations are in conjunction with California Highway Patrol and participating Contra Costa County Police Departments. Contra Costa DUI defense lawyer explains DUI arrests and courthouse information for drunk drivers with court appearances in Martinez, California. Give us a call or fill out the form below to contact one of our team members. The Blalock Law Firm, PC. Contact 925-259-3270. Links. Contra Costa County DUI Lawyer Robert Tayac is recognized as being one of the top driving under the influence (DUI) defense attorneys in California. The district attorney has up to one year on misdemeanor DUIs to file charges. Contact Our Walnut Creek DUI Attorney Today.