About Us
William J. Duffy: Criminal Defense Lawyer in Orange County

Trusted Legal Defense from an Experienced Orange County Insider

Duffy didn’t just learn the law; he lived it in the Southern California trenches. After serving as a public defender in San Bernardino and working with the L.A. County District Attorney’s Justice System Integrity Division, founded Duffy Law, PC to serve his neighbors here in the OC.

Our Legal Services for You.

We provide expert legal solutions with trusted advice, strong representation, and proven results for individuals, families, and businesses.

Orange County DUI Defense

Facing a DUI in Irvine or Newport Beach? From DMV APS hearings to complex court litigation, we fight to protect your license and your future.

Domestic Battery & Spousal Defense

We specialize in pre-filing dismissals and modifying protective orders. Don’t let a single dispute redefine your family life.

Theft & Drug Crimes

Aggressive representation for possession, sales, and theft charges. We prioritize rehabilitation and getting your life back on track.

Post-Conviction Relief

Clean up your criminal record. We help with expungements and reducing felonies to misdemeanors to restore your rights.

Victim’s Rights Advocacy

Victims deserve a voice throughout the legal process. We advocate for victims’ rights with care and determination, helping ensure they are informed, protected, and treated with respect at every stage.

Relentless Trial Advocacy

With over 20 jury trials, we don't back down. We provide seasoned expertise and a heartfelt commitment to your defense in court.