Car keys and alcohol

DWI Attorney

Have you been charged with DWI or DUI in San Marcos, TX? You need an attorney who can protect your rights.

Jason Trumpler is a DWI lawyer who can fight to make sure you don't suffer unjust consequences. 

We are available around the clock to schedule your free consultation with our Austin-based lawyer.

We Are Ready to Fight for You Jason Trumpler Is a DWI Lawyer Who Gets Results

A charge of DWI can place your freedom, your finances, and your reputation in jeopardy. Meanwhile, the techniques that law enforcement use to identify drivers under the influence have many flaws that could easily result in innocent drivers being subjected to unjust punishment. If you have been charged, the Law Offices of Jason Trumpler, serving San Marcos, TX, and communities throughout Greater Austin, are open around the clock to book your free DWI case review.

Jason Trumpler is no ordinary DWI lawyer. He has worked as both a prosecutor and defense attorney in his career of more than two decades, and his years spent trying these cases from both standpoints has given him valuable insight benefitting many clients throughout San Marcos and Greater Austin, TX. You have absolutely nothing to lose by booking a consultation with our DWI lawyer. If we take your DWI case, you'll find that our rates are highly competitive compared to most other area firms. Don't wait any longer to hire a lawyer. Call now:

Person reaching for car keys with alcohol bottle next to them

"I'm very thankful."


Benji A


Google logo

Case Dissmissed! Jason is straight forward and honest. I am beyond grateful. Jason and his team (Tony Sun in particular) exceeded expectations. Put your future in hands you can trust, go with Jason Trumpler.

View on Google

Gustavus Chisholm


Google logo

To whom it may concern I highly recommend Jason Trumpler if you need a great attorney and find yourself in a situation beyond your control. He kept me informed and worked very hard on my case and got it dismissed, if you're a veteran and/or civilian he will work hard to represent your case I'm very thankful for everything he did.

View on Google

San Marcos and Hays County Can Count on Jason Trumpler A Lawyer Providing Effective Criminal Defense

San Marcos on map

Hays County sits between Austin and San Antonio, making Interstate 35 a busy route. Located almost exactly between these cities, San Marcos is home to Texas State University. Many Hays County residents travel to Austin and San Antonio on a regular basis for work and entertainment, and students account for a significant amount of traffic within the county. This places many residents under the scrutiny of both local and state law enforcement on a daily basis.

But just because you are traveling back home from Austin, TX, in the earliest hours of the morning does not mean you are under the influence, and not every student making a late-night drive is making poor choices that place others in danger. Unfortunately, it almost always takes a lawyer to prove this once law enforcement files charges. Fortunately, DWI lawyer Jason Trumpler is always ready to provide criminal defense services to Hays County and communities throughout Central Texas.

What Makes Mr. Trumpler the Lawyer to Choose?

When suspicion of driving while intoxicated turns into a serious criminal charge in or near San Marcos, Jason Trumpler is an outstanding choice of DWI attorney. Several qualities set him apart from other lawyers, including:


You don't have to look any further than Jason Trumpler's track record of courtroom victories to see that he has been proven capable of bringing the truth to light when clients face unjust criminal charges. We understand that at this moment, it feels like the odds are against you. Rest assured that if your charges outweigh any wrongdoing or are completely unwarranted, Jason Trumpler will make this clear to a jury.

Reasonable Rates

You can't put a price on your freedom, but you can certainly put a price on competent legal representation. As Jason Trumpler's client, you can rest assured that that price won't leave you destitute once the case closes. On average, clients can expect to pay $3,000 to $10,000 in attorney fees, which is very reasonable when compared to the rates for a DWI attorney's services at other firms in the San Marcos, TX, area.

Real Talk

Communication is paramount to a successful criminal defense. During your free consultation, Mr. Trumpler can provide you with an honest assessment of your case and the results he believes he can help you achieve. If he takes your case, you will receive ongoing communication that keeps you informed every step of the way. Mr. Trumpler will make sure you understand what is happening at each stage of your case.

Do I Really Need to Hire an Attorney?

If you are facing DUI or DWI charges in or near San Marcos, Texas, the answer is yes—you need a lawyer now. You may feel certain, beyond a shadow of a doubt, that you face wrongful charges. Or, even if you believe your innocence will require uncovering and exposing certain facts, you may believe that this should be no problem for a public defender to handle. But before you choose not to hire an attorney, consider:

Public Defenders Rarely Have the Bandwidth You Need

It's no secret that public defenders are stretched to their limits—and often beyond—when it comes to their caseload. Trusting your case to a public defender doesn't make your conviction certain, but it will probably make achieving reduced or dropped charges much more unlikely. By hiring the Law Offices of Jason Trumpler to provide counsel, you can rest assured that your case will receive the attention, investigation, and dedication it needs.

Mr. Trumpler Frequently Handles DWI Cases

Jason Trumpler doesn't exclusively provide DWI defense, but DWI cases do account for a significant portion of this Texas lawyer's caseload. And as an attorney who has worked as both a prosecutor and a defender throughout the course of his career spanning more than two decades, he has an intimate knowledge of the tactics both sides use, as well as the first places to look for weak points in the prosecution's case.

There Is Too Much at Stake

Even if this is your first DWI offense, a conviction could result in jail time of up to six months, license suspension of a year, and up to $2,000 in fines. Subsequent offenses have exponentially harsher penalties, with a third offense being punishable by up to a decade in jail and fines of as much as $10,000. With a lawyer like Jason Trumpler on your side, you can avoid incarceration and have the case expunged from your record so that you don't have to carry a constant reminder of this challenging time in your life.

We Are Available 24/7 Book Your Free Case Review Now

When DWI or DUI charges threaten your freedom, it's never too soon to hire an attorney. Whether you call the Law Offices of Jason Trumpler at 3 p.m. or 3 a.m., a person will answer the phone and arrange to put you in touch with our DWI attorney as soon as possible. As a firm that has successfully helped many clients from San Marcos, TX, and beyond, we understand the pressure you are currently under. Reach out to an attorney now to take the most important step toward protecting your rights.

"Jason went above and beyond for me on my DWI charge."


Carlos Machado


Google logo

Jason & his assistant Alex are amazing. Jason will tell you how it is and won’t give you false hopes on what he can do for you. Jason went above and beyond for me on my DWI charge and unlawful carrying of a weapon.

View on Google



Google logo

Jason went beyond his scope of responsibility and demonstrated genuine care for my son, recommending the best way to help him succeed. Thanks!

View on Google

DWI Charges Don't Have to Lead to Conviction When You Hire Attorney Jason Trumpler for DWI Defense

Everyone makes mistakes on the job. Unfortunately, when law enforcement personnel make mistakes on the clock, it can change lives for the worse. Because even a charge of DUI or DWI without conviction can carry a damaging stigma, you may believe there is no hope for your case. But rest assured, if the DWI charges against you are unwarranted or allege an extent of criminal activity you did not commit, Jason Trumpler can make these discrepancies clear to a jury. 

Let's say you failed a field sobriety test, breathalyzer, or blood test. Each requires a specific protocol, and none are error-free. Misconduct such as using an improperly calibrated breathalyzer or allowing a blood sample to become contaminated can be uncovered by Mr. Trumpler and used to discredit the prosecution's argument. Similarly, if a condition such as an inner ear infection affects your equilibrium and causes you to fail a field sobriety test, Mr. Trumpler can illustrate this point to a jury.

Another example of a defense strategy relates to the fact that law enforcement must have probable cause to arrest you. That means there must be evidence that would reasonably suggest criminal activity had taken place, such as the smell of alcohol on your breath or open alcohol containers in the car. Although this can be difficult to dispute, Mr. Trumpler will analyze the facts to determine if the arresting officer actually had probable cause to arrest you on charges of DWI.

Jason Trumpler

"He swooped in like a superhero."


Montana Bray


Google logo

Mr. Trumpler was professional, approachable, incredibly down to earth and reasonable with his prices. He swooped in like a superhero when another firm had left me high and dry, and then helped me reach a favorable conclusion to my case in record time. 5 stars isn't enough, thank you Mr. Trumpler!

View on Google

Sarah Garner


Google logo

Good communication; Jason has a lot of experience, Has worked as a prosecutor. He is very knowledgeable, straightforward, and well known. His assistant Mia has amazing time management, with the ability to answer all/ most questions; if she does not have an answer, she will find out and call you as soon as she finds out. High recommend Jason Trumpler

View on Google
Jason Trumpler

The Law Offices of Jason Trumpler

Jason Trumpler has handled thousands of criminal cases over nearly 20 years. He is a current or past member of several national, state, and local legal associations, including:

  • American Bar Association
  • Austin Bar Association
  • Williamson County Bar Association
  • National College for DUI Defense®
  • Texas Criminal Defense Lawyers' Association
  • National Association of Criminal Defense Lawyers
  • Austin Criminal Defense Lawyers Association
  • DUI Defense Lawyers Association

Contact our firm online or call us at (512) 457-5200 for a free case review.

Contact Us Today

Rate, Review & Explore

Social Accounts Sprite