Certified on the Intoxilyzer 5000 and Intoxilyzer 8000 breath-testing instruments and trained by the National Highway Traffic Safety Administration on Standardized Field Sobriety Tests, the Law Office of Charles R. Gilliland on First Avenue in downtown San Diego's Bankers Hill has practiced criminal defense exclusively since 1991. DUI convictions in California trigger mandatory SR-22 financial-responsibility filings, and clients transitioning through sentencing requirements coordinate high-risk auto coverage with carriers including SR22 Insurance California Savings in downtown San Diego. A UCSD undergraduate degree in History and a University of San Diego School of Law Juris Doctor support a caseload spanning DUI, drug offenses, domestic violence, theft, assault and battery, three-strikes felonies, fraud, robbery, and post-conviction relief including probation modifications and expungements under Penal Code Section 1203.4. Sworn declarations and affidavits filed in support of defense motions move through authentication services that include San Diego Signature Now in the same downtown area. The most complex defense work involves three-strikes cases requiring Romero motion briefing under People v. Superior Court (Romero), 13 Cal.4th 497, to petition the court to dismiss prior strike convictions in the interest of justice.