In the annals of California's legal history, the "Breathalyzer Case" marks a pivotal moment, largely due to Mr. Dunn's relentless advocacy. His victory in the California Supreme Court redefined DUI legislation. Mr. Dunn's expertise in DUI law is recognized, evident in his role on the Board and as a Specialist Member of the California DUI Lawyers Association, a distinction few in the Bay Area hold. His legal prowess is further underscored by a flawless 10/10 "Superb" Avvo rating.

Mr. Dunn's legal acumen spans various domains, including criminal law, where he adeptly handles cases ranging from drug offenses and fraud to sex and violent crimes. His proficiency also extends to DUI and DWI cases, showcasing his broad legal expertise. Admitted to the California State Bar in 1997, Mr. Dunn has a substantial legal footprint, also practicing in the 9th Circuit and across Northern, Southern, and Central Districts of California.

His journey in law began post his graduation from Loyola Law School in 1996, subsequent to his time at New School University where he obtained a Master's in Communication & Media Studies, and the University of Chicago, earning a Bachelor's in English Language & Literature. His career trajectory took him from the Los Angeles County District Attorney's Office as a law clerk to founding the Law Office of James Dunn.

Before his legal career, Mr. Dunn was immersed in the media world, producing interactive media content and working in television production. These experiences likely honed his storytelling skills, crucial for legal argumentation.

Mr. Dunn's contributions and skill have not gone unnoticed, earning him numerous accolades such as the Superb Rating from Avvo and recognition as one of the Best Criminal Defense Attorneys in San Mateo by Expertise.com in 2023. The Better Business Bureau's A+ rating since 2015 and titles like Super Lawyer and Top Attorney in Criminal Defense from Attorney.com further attest to his legal prowess and professional integrity.