DWI Defense Attorney | Hays County

We Don’t Want One Mistake to Define Your Future

Driving through the downtown San Marcos square or heading home along Interstate 35 should not end with handcuffs and a trip to the Uhland Road jail facility. A single night of bad timing can put your career, your driver’s license, and your freedom at risk, and the local district attorney’s office pursues DWI offenses with significant resources.

You probably feel a mix of fear and confusion about what happens next. You do not have to carry that alone.

At Seymour & Vaughn, we understand the specific stress that follows a DWI arrest, and we believe one mistake should not define the rest of your life. As a firm led by former prosecutors, we have spent years watching how the state prepares these cases, and that experience helps us find weaknesses other attorneys miss.

The clock is already running on several parts of your defense. From the moment the officer pulled you over, the state began gathering evidence to use against you, and whether you were stopped by the San Marcos Police Department, the Hays County Sheriff’s Office, or a state trooper, you need a plan.

Call Seymour & Vaughn at (830) 282-8751 to schedule a free consultation. We will answer your questions and start building your defense.

Why Does the 15-Day License Deadline Matter So Much?

You have 15 days from the date of your notice of suspension to request an ALR hearing with the Texas Department of Public Safety. Miss it and your license is suspended automatically on the 40th day after arrest, whether or not you are ever convicted of anything.

Most people assume the only thing to worry about after a DWI arrest is the first court date. A separate legal battle over your ability to drive begins almost immediately.

After a DWI arrest in Texas, the officer serves you with a written notice of suspension. That notice starts a process known as Administrative License Revocation, and you request the hearing through the Texas Department of Public Safety.

What a Suspension Actually Costs in Hays County

A suspended license makes it nearly impossible to get to work or handle family responsibilities in a spread-out county like this one. There is no practical transit alternative between Kyle, Buda, Wimberley, and San Marcos.

For commercial drivers, delivery workers, healthcare staff on rotating shifts, and parents managing school runs, the license consequence often lands harder than the criminal one.

The ALR Hearing as a Discovery Tool

Our law offices prioritize this hearing for two reasons. The first is keeping you on the road.

The second is discovery. The ALR hearing gives us an early chance to cross-examine the arresting officer under oath, long before trial, and that testimony can expose problems with the stop, the arrest decision, or the breath or blood test that come up later in the criminal case.

We handle the paperwork and the strategy for these hearings so you can focus on getting your life back on track.

How Does Texas Define Intoxication?

Texas law defines intoxication two ways, and the State only needs to prove one. You are intoxicated if you lack the normal use of your mental or physical faculties due to alcohol or drugs, or if your blood alcohol concentration is 0.08 or more.

In Texas, the law on driving while intoxicated is found in Texas Penal Code Section 49.04.

The statutory definitions are:

• Not having the normal use of your mental or physical faculties because of alcohol, a controlled substance, a drug, a dangerous drug, or a combination of those substances.
• Having a blood alcohol concentration (BAC) of 0.08 or more.

You can be charged with DWI even if your BAC was below 0.08, as long as the officer claims you lost the normal use of your faculties. That subjective standard gives police a lot of power, and it also leaves room for a strong defense built on the officer’s own recorded observations.

Punishment Levels for a First Offense

Texas treats a first-time DWI as a Class B misdemeanor carrying a minimum of 72 hours of confinement, though specific facts can change that. An open container of alcohol in the vehicle raises the minimum jail time to six days.

A blood alcohol content of 0.15 or higher enhances the charge to a Class A misdemeanor, with higher fines and longer potential jail time. That single threshold changes both the exposure and the bond conditions a magistrate is likely to impose.

Are Standardized Field Sobriety Tests Reliable?

Only when administered exactly as trained. Standardized field sobriety tests were validated under controlled conditions, and their accuracy drops sharply when the surface, lighting, weather, or the driver’s physical condition differs from those conditions.

Most DWI cases in San Marcos, TX, involve roadside exercises known as standardized field sobriety tests. The National Highway Traffic Safety Administration developed them, and the three tests usually performed are the Horizontal Gaze Nystagmus, the Walk and Turn, and the One-Leg Stand.

What Officers Call a Clue

Officers often present these tests as if they were foolproof scientific evaluations. In reality, an officer might mark a clue of intoxication because your heel did not perfectly touch your toe, or because you used your arms for balance during a gust of wind.

Conditions that produce false clues include uneven pavement, bright police lights, heavy traffic noise on I-35, cold weather, fatigue, footwear, inner ear conditions, and plain nervousness at the side of a highway.

How We Review the Video

We review the body camera and dashboard camera footage with a critical eye. We check whether the officer gave the correct instructions, demonstrated the test properly, and whether the environment was suitable for testing at all.

If the officer deviated from NHTSA standards, the results may be unreliable and the jury should hear why. Challenging these tests is a cornerstone of a strong defense.

Can a Breath Test or Blood Test Be Challenged?

Yes. Breath machines must be calibrated and maintained under strict state regulations, and blood samples must be drawn, preserved, and stored correctly. Failures in maintenance records, observation periods, or chain of custody can make a test result inadmissible or unpersuasive.

If an officer arrests you for DWI, they will likely ask you to submit to a breath test or a blood test. Under the Texas Implied Consent Law, a person arrested for an intoxication offense committed while operating a motor vehicle in a public place is deemed to have consented to provide one or more specimens of breath or blood for analysis.

What Happens If You Refuse

If you refuse to provide a specimen, the state will use that refusal as grounds to suspend your license for a longer period. A refusal does not mean the state will not get a sample.

In Hays County, officers often obtain search warrants to draw blood involuntarily. These “no refusal” weekends are common during holidays and major events in San Marcos and Buda.

Attacking the Result

Even a result over the limit does not end the case. We investigate the maintenance records of the machines, the qualifications of the people who drew and tested your blood, and whether the sample was stored properly.

Blood cases in particular can turn on details the lab report does not advertise, including preservative failure, fermentation, and gaps in the documented chain of custody. Errors in those areas can get the evidence suppressed.

What Are the Penalties for a DWI Conviction in Texas?

A first DWI is a Class B misdemeanor carrying up to 180 days in jail and a $2,000 fine. A second is a Class A misdemeanor with up to one year and $4,000. A third is a third-degree felony carrying two to ten years in state prison.

The consequences of a DWI conviction go far beyond the courtroom, and a conviction creates a permanent criminal record that affects your employment and your reputation.

A first offense Class B misdemeanor DWI can result in:

• Fines up to $2,000.
• Jail time between 3 and 180 days.
• A driver’s license suspension of up to one year.
• Annual state surcharges to keep your license.

Repeat Offenses and Enhancements

For repeat offenses, the stakes climb quickly. A third DWI is a third-degree felony that can result in 2 to 10 years in state prison and permanent loss of certain civil rights.

Enhanced penalties also apply if a child passenger under 15 was in the vehicle, or if the DWI caused injury or death through intoxication assault or intoxication manslaughter. Those cases involve crash reconstruction, medical records, and causation questions that require immediate investigation.

Ignition Interlock and Daily Life

Beyond the fines and jail time, you may be required to install an ignition interlock device in your car. The device requires a clean breath sample before the vehicle will start, and it is both expensive and intrusive.

For many clients the interlock is the consequence that reshapes daily routine most, affecting work vehicles, carpools, and school drop-offs. We work to help you avoid it where the facts allow.

How Do the Hays County Courts Handle DWI Cases?

Misdemeanor DWI cases are heard in one of the three Hays County Courts at Law at the Government Center in San Marcos. Felony DWI cases go to the District Courts. Each judge and prosecutor approaches plea negotiations and suppression motions differently.

Most misdemeanor DWI cases are heard at the Hays County Government Center in San Marcos.

Because we have local roots and a background in the district attorney’s office, we know the personalities and policies that will shape your case. We understand how these courts manage their dockets and what they weigh when evaluating plea agreements or motions to suppress.

We guide you through every step, from your initial arraignment to pretrial hearings and potential jury trials, and we explain what to expect at each setting so you never feel lost.

What Defense Strategies Work in a DWI Case?

The most effective DWI defenses attack the legality of the stop, the validity of the arrest decision, and the reliability of the testing. If the stop was unlawful, everything gathered afterward, including statements and test results, may be inadmissible.

No two DWI cases are the same, and every stop has facts that can lead to a dismissal or a reduction. Our first step is always a thorough review of the evidence.

Challenging the Initial Stop

An officer must have reasonable suspicion to pull you over and probable cause to arrest you. If the officer stopped you without a valid legal reason, everything gathered afterward may be thrown out, including your statements, the field sobriety test results, and any breath or blood samples.

The 15-Minute Observation Period

We also look at the observation period required before a breath test. Officers must closely observe you for at least 15 minutes to make sure you do not put anything in your mouth or burp, either of which can skew the result.

If the officer was busy with paperwork, moving the patrol car, or talking to others during that window, the breath test results are open to challenge. Our background as former prosecutors helps us find procedural errors that others overlook.

Is Deferred Adjudication or Pretrial Diversion an Option?

For some first-time offenders, yes. Texas now allows deferred adjudication in certain DWI cases, and Hays County offers a pretrial diversion program. Both can end with the case dismissed and no conviction on your record.

Deferred adjudication involves pleading guilty or no contest in exchange for a period of community supervision. Complete the requirements and the court dismisses the case without a formal conviction.

Hays County’s pretrial diversion program typically requires classes, community service, and staying out of trouble for a set period. Finish the program and the district attorney agrees to dismiss the charges.

Neither option is automatic and neither is right for everyone. Eligibility depends on your history, the facts of the arrest, and the prosecutor assigned, and both carry conditions worth understanding fully before you agree to them.

Call a San Marcos DWI Lawyer Today

The sooner you involve a DWI attorney, the more options we have to protect your rights. We serve clients throughout San Marcos, Kyle, Buda, and the surrounding area.

Contact Seymour & Vaughn today at (830) 282-8751. The initial consultation is free, and we are ready to review the state’s evidence and start building your defense.