Testimonials

What a great experience meeting Matt O'Connor for the first time. He really made me feel comfortable and had a very relaxed conversation about some general life things and then, of course, legal matters. I feel extremely confident having Matt as my...
Dave C.

Mr. O’Connor saved my life and my career. He not only made the entire process completely seamless for me, but he was also able to achieve the best possible outcome for my situation. I recommend him to all of my friends and...
Sasha

Mr. O'Connor is very professional and very easy to work with; he does his job fast and accurately. I would highly recommend him to others.
Yardena S.

Contra Costa County Criminal Lawyer

When everything is on the line–your freedom, your future, your name–you need more than just a lawyer. You need a relentless fighter in your corner. At O’Connor Law, we don’t back down. As your Contra Costa County criminal lawyer, Attorney Matthew O’Connor brings the full force of his prosecutorial experience to your defense, armed with strategy, precision, and grit. This isn’t about quick fixes or half-measures–it’s about a personal commitment to stand between you and the power of the state. If you’re facing criminal charges, we’re here to push back hard, defend your rights fiercely, and demand the justice you deserve.

Attorney O'Connor speaking with his team

Meet Attorney Matthew O’Connor

Quality representation makes a difference, and that is what you will receive from O’Connor Law. Matthew O’Connor brings his years of experience as a former prosecutor to the zealous representation of his clients. Mr. O’Connor has successfully defended those accused of crimes and personally handled dozens of jury trials. That experience will serve you well as Mr. O’Connor fights to protect your rights, your freedom, and your good reputation.

Learn More About Matthew

Why a former prosecutor is your strongest ally

Insider Knowledge of the System

Matthew J. O’Connor worked on the other side and knows every move the prosecution or opposing counsel might make. That means sharper strategy and smarter defense for you.

Trial-Tested Experience

Years of courtroom battles have shaped Attorney O’Connor into a powerful advocate. He is calm under pressure, persuasive before a jury, and always ready to go the distance.

Credibility That Commands Respect

When a former prosecutor like Attorney O’Connor walks into the room, people listen. Judges and opposing attorneys recognize his background and treat his cases seriously.

Deep Investigative Insight

Mr. O’Connor worked with law enforcement, built cases from the ground up, and knows how to spot flaws in the evidence. That insight can mean the difference between winning and losing.

Our Criminal Defense Services

O’Connor Law is a steadfast legal advocate for those facing criminal charges in Contra Costa County and throughout the East Bay area. Whether you’re accused of driving under the influence or a violent felony, you can depend on our legal team to fight for the best outcome possible on your behalf. Some of the many criminal charges we defend against are as follows:

Assault Domestic Violence Driving Under the Influence Drug Crimes Juvenile Crimes Theft Crimes Gun Crimes Sex Crimes Three Strikes Cases White Collar Crimes Violent Crimes Expungements

Our Personal Injury Services

Sustaining an injury due to another party’s negligence can be a painful, confusing, and even overwhelming experience. However, with the right legal team in your corner, you can have peace of mind knowing your case is in good hands. If you’re an accident victim, you can depend on us. We handle injury lawsuits stemming from the following:

Car Accidents Motorcycle Accidents Pedestrian Accidents Truck Accidents Medical Malpractice Slip & Fall Accidents Work Injuries Dog Bites Wrongful Death

man with a gauze bandage wrapped around his hand