
Strategic DWI defense for clients throughout Galveston & Harris Counties.
Being arrested for driving while intoxicated can be overwhelming. In addition to criminal penalties, you may be worried about your driver’s license, your job, increased insurance costs, and how a conviction could impact your future. While these concerns are understandable, it’s important to remember that an arrest is not the same as a conviction. Before prosecutors can obtain a guilty verdict, they must prove every element of the offense beyond a reasonable doubt.
At Mark Diaz & Associates, we represent individuals facing DWI charges throughout Galveston County and the surrounding area, including Harris County. Led by attorney Mark Diaz, who has focused exclusively on criminal defense for nearly 30 years, our firm provides strategic, personalized representation designed to protect your rights and pursue the best possible outcome.
No two DWI cases are exactly alike. Some begin with a routine traffic stop, while others involve an accident or a report from another driver. Regardless of how the investigation begins, prosecutors must rely on evidence to prove their case.
Our firm represents clients facing a wide range of DWI-related charges, including:
Every case deserves a careful review of the evidence. We examine whether the initial traffic stop was lawful, how field sobriety testing and chemical testing were conducted, whether law enforcement followed proper procedures, and whether the prosecution can prove the charges beyond a reasonable doubt.
Many people believe a failed breath or blood test automatically results in a conviction. In reality, chemical testing is only one part of the evidence prosecutors may rely upon. Questions involving traffic stops, field sobriety tests, laboratory procedures, body camera footage, and constitutional issues can all play an important role in building a defense.
At Mark Diaz & Associates, criminal defense is our sole focus. For nearly three decades, attorney Mark Diaz has represented individuals charged with DWI and other serious criminal offenses throughout Texas. Whether this is your first arrest or you’re facing felony DWI charges, our firm is committed to providing the personalized attention, thorough preparation, and strategic advocacy your case deserves.
If you’ve been arrested for driving while intoxicated, don’t assume the outcome of your case has already been decided. Contact Mark Diaz & Associates today to discuss your situation, understand your legal options, and begin building your defense.
Call 409-515-6170 today to schedule your free consultation. Se habla español.

Mark Diaz and Associates were an amazing team to work with. Highly recommend them for anyone interested in seeking help. Everyone was very knowledgeable and exceedingly helpful throughout my time working with them. As a first timer who needed assistance they made the judiciary process quite simple. I am very privileged to have had the experience of working with such a wonderful group. If you need a team with experience, knowledge and passion these are the people for you.
This entire team was absolutely wonderful to work with. Where other attorney teams refused to listen, the Mark Diaz team stepped up. Not only did they take on my case, but they went out and fought for me. I simply shared with them the facts of the events that took place, and Ms. Jessica Ebbs pushed us to a Jury Trial and had the case dismissed entirely. I am eternally grateful. I highly recommend this team to anyone faced with a wrongful suit, or who may be facing consequences unequal to the facts of the matter. They truly care, and they truly put in the due diligence necessary to defend their clients.
A DWI arrest can have lasting consequences beyond the courtroom, including the loss of your driving privileges, increased insurance costs, and a permanent criminal record. Mark Diaz & Associates provides strategic DWI defense throughout Galveston and Harris Counties, working to protect your rights and pursue the best possible outcome.
Protecting clients charged with driving while intoxicated through strategic legal representation focused on protecting their rights and future.
Defending clients charged with drug possession, distribution, trafficking, and other drug-related offenses.
Strategic defense for individuals accused of domestic violence and other family violence-related criminal offenses.
Experienced defense for a wide range of misdemeanor and felony charges, including theft crimes, violent crimes, federal offenses, and more.