
Strategic criminal defense for misdemeanor and felony charges
throughout Galveston & Harris Counties.
Being arrested or charged with a crime can change your life in an instant. Whether you’re facing a misdemeanor, a serious felony, or have recently learned you’re under investigation, the uncertainty alone can be overwhelming. You may be worried about your freedom, your family, your job, your reputation, and what the future holds.
While every case is different, one thing remains true: 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. Every criminal investigation should be carefully reviewed, every piece of evidence should be examined, and every defendant deserves an experienced advocate protecting their rights.
At Mark Diaz & Associates, criminal defense isn’t just one of our practice areas – it’s our sole focus. Led by attorney Mark Diaz, who has devoted nearly 30 years exclusively to criminal defense, our firm represents individuals throughout Galveston County and the surrounding area, including Harris County. Whether you’ve been accused of a first-time offense or are facing complex felony charges, we’re committed to providing the strategic, personalized representation you deserve.
No two criminal cases are exactly alike. Some begin with a traffic stop, others with a lengthy investigation, and some involve allegations made by another individual. Regardless of the circumstances, our job is the same – to carefully evaluate the facts, protect your constitutional rights, and pursue the strongest possible outcome.
Our firm represents clients facing a wide range of misdemeanor and felony charges, including:
If your specific charge isn’t listed above, don’t assume we can’t help. Our firm has experience defending clients accused of virtually every type of criminal offense under Texas law.
Criminal cases are rarely as straightforward as they first appear. Law enforcement investigations may involve witness statements, surveillance video, search warrants, forensic testing, digital communications, body camera footage, or physical evidence. In many cases, the outcome depends on much more than the allegations contained in a police report.
Our firm carefully reviews every aspect of the prosecution’s case, including how the investigation was conducted, whether proper procedures were followed, and whether the evidence supports the charges being filed. We don’t believe in one-size-fits-all defense strategies because every client, every investigation, and every case presents different facts and legal issues.
Whether your case is resolved through negotiation or ultimately proceeds to trial, our goal remains the same: protecting your rights while pursuing the best possible result under the circumstances.
When your freedom and future are at stake, experience matters.
For nearly three decades, attorney Mark Diaz has focused exclusively on criminal defense, representing individuals charged with misdemeanor and felony offenses throughout Texas. That experience allows our firm to anticipate challenges, identify opportunities, and develop defense strategies tailored to the unique facts of each case.
Just as important, we understand that criminal charges affect more than what happens inside a courtroom. They can impact your career, professional licenses, financial stability, family relationships, and reputation. That’s why we’re committed to providing honest guidance, responsive communication, and personalized representation from the moment you contact our office until your case is resolved.
If you’ve been arrested, charged with a crime, or believe you’re under investigation, don’t wait to protect your rights. The earlier you involve an experienced criminal defense attorney, the sooner your case can be evaluated and a defense strategy can begin.
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.
Whether you’re facing a misdemeanor or felony charge, Mark Diaz & Associates provides strategic criminal defense throughout Galveston and Harris Counties. Every case deserves careful preparation, personalized attention, and an aggressive defense strategy focused on protecting your future.
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.