Defending Your Rights: Comprehensive DWI & Intoxication Offense Defense

Facing DWI Charges? Your Future Deserves a Vigorous Defense

A charge of Driving While Intoxicated (DWI) in Texas is not a simple traffic ticket—it is a serious criminal offense that carries immediate and long-lasting consequences. From the moment those flashing lights appear in your rearview mirror, the process that unfolds is designed to build a case against you. At Barton & Associates, we understand the anxiety, confusion, and high stakes involved. Our dedicated criminal defense attorneys are committed to providing the aggressive, knowledgeable representation you need to protect your driver’s license, your freedom, and your reputation. We know the science, the procedures, and the strategies necessary to challenge the prosecution’s evidence at every turn.

Many people believe that a DWI arrest leads to an automatic conviction. This is a dangerous misconception. The state must prove its case beyond a reasonable doubt, and every aspect of their evidence—from the initial traffic stop to the breath or blood test results—is open to challenge. An experienced DWI defense lawyer examines the entire sequence of events for constitutional violations, procedural errors, and scientific inaccuracies. Whether this is your first offense or you are facing enhanced penalties, having our skilled legal team by your side is the most critical step you can take to secure your future.

Understanding Texas DWI Law and Its Severe Penalties

In Texas, you can be arrested for DWI if you are found to be operating a motor vehicle in a public place while “not having the normal use of your mental or physical faculties” due to alcohol or drugs, or if you have a Blood Alcohol Concentration (BAC) of 0.08% or higher. For commercial drivers, the limit is 0.04%, and for drivers under 21, any detectable amount of alcohol can lead to a DWI charge.

The penalties for a DWI conviction are severe and escalate quickly with subsequent offenses or aggravating factors:

• First Offense DWI: A Class B misdemeanor punishable by up to 180 days in jail, a fine up to $2,000, and a driver’s license suspension from 90 days to one year. You may also be required to pay an annual surcharge of up to $2,000 for three years to keep your license.
• Second Offense DWI: A Class A misdemeanor punishable by up to one year in jail, a fine up to $4,000, and a driver’s license suspension for up to two years.
• Third Offense DWI: A third-degree felony punishable by 2 to 10 years in a state prison, a fine up to $10,000, and a driver’s license suspension for up to two years.
• Felony DWI: Charges can be elevated to a felony even on a first offense if there is an open container, if an accident causes serious bodily injury (Intoxication Assault), or if someone is killed (Intoxication Manslaughter). These charges carry prison terms of up to 20 years or more.

Beyond the courtroom, a conviction brings collateral consequences: skyrocketing insurance rates, difficulty securing employment, professional licensing issues, and a permanent criminal record. Our goal is to help you avoid these life-altering outcomes.

The Critical Importance of the ALR Hearing: Act Within 15 Days

One of the most immediate and misunderstood aspects of a DWI arrest is the Administrative License Revocation (ALR) program. This is a civil administrative process separate from your criminal case. When you are arrested for DWI, the officer will typically confiscate your Texas driver’s license and issue a temporary permit. You have only 15 days from the date of your arrest to request a hearing to fight the suspension of your license.

If you fail to request this hearing, your license will be automatically suspended 40 days after your arrest, even if your criminal case is still pending. At Barton & Associates, we file the ALR hearing request immediately. This hearing is a crucial opportunity to:

• Cross-examine the arresting officer under oath before the criminal trial.
• Gain discovery and insight into the officer’s observations and procedures.
• Preserve testimony that can be used later in your criminal case.
• Potentially save your driving privileges.

Our Strategic Defense: Challenging Every Element of the State’s Case

A successful DWI defense requires a meticulous, multi-faceted approach. We leave no stone unturned in reviewing the evidence against you.

1. Challenging the Legality of the Traffic Stop

The police must have a valid legal reason, or “reasonable suspicion,” to initiate a traffic stop. We scrutinize the officer’s stated reason for pulling you over. If the stop was illegal—based on a hunch, a pretext, or a minor traffic violation that did not actually occur—then all evidence gathered afterward may be suppressed, often leading to a dismissal of your case.

2. Challenging the Field Sobriety Tests

The standardized field sobriety tests (SFSTs)—the Horizontal Gaze Nystagmus, Walk-and-Turn, and One-Leg Stand—are scientifically designed to be difficult, even for sober individuals. Their administration is highly subjective. We examine whether:

• The officer improperly demonstrated or explained the tests.
• Environmental conditions (poor lighting, uneven pavement, weather) or your physical conditions (injury, age, weight, medical issues) unfairly affected your performance.
• The officer was properly trained and certified to administer the tests.

3. Challenging the Breath Test (Breathalyzer) Evidence

Breath test machines like the Intoxilyzer are complex devices that require proper calibration, maintenance, and operator training to produce accurate results. Our defense investigates:

• The machine’s calibration and maintenance records for errors.
• Whether the 15-minute observation period was properly followed before the test.
• Whether any physiological conditions (acid reflux, diabetes, ketosis) or residual mouth alcohol skewed the result.
• The qualifications and procedures of the test operator.

4. Challenging the Blood Test Evidence

A blood test is often considered more reliable by juries, but it is also vulnerable to attack. We work with forensic toxicologists to examine:

• The chain of custody for the blood sample to ensure it was not contaminated or mislabeled.
• The techniques used for drawing, preserving, and testing the blood.
• Whether the blood fermentation process or improper storage could have raised the BAC level.
• The validity of the search warrant used to obtain the blood sample, if applicable.

Beyond Standard DWI: Other Intoxication-Related Offenses

Our practice also robustly defends clients against other serious intoxication-related charges:

• Boating While Intoxicated (BWI): The same penalties as DWI apply to operating a boat or watercraft while intoxicated on Texas waterways.
• Flying While Intoxicated: Operating an aircraft under the influence is a serious federal and state offense.
• Intoxication Assault & Intoxication Manslaughter: These felony charges allege you caused serious bodily injury or death while operating a vehicle intoxicated. Defending these charges requires an exceptionally skilled and thorough team capable of handling complex accident reconstruction and forensic evidence.
• Open Container and DWI with a Child Passenger: These are enhancing circumstances that can increase the severity of your charges and penalties.

The Barton & Associates Advantage in DWI Defense

• In-Depth Knowledge of DWI Science: We continuously educate ourselves on the latest forensic toxicology, breath test technology, and field sobriety test protocols. We don’t just take the state’s scientific evidence at face value; we understand it well enough to challenge it effectively.
• Former Prosecutorial Insight: Our team includes attorneys with experience on the prosecution side. This gives us invaluable insight into how the state builds and negotiates DWI cases, allowing us to anticipate their strategies and identify weaknesses.
• A Reputation for Trial Readiness: Prosecutors are more likely to offer favorable plea bargains or even dismiss cases when they know your attorney is fully prepared to take the case to trial and win. We have a strong track record in the courtroom, and that reputation works to your advantage from day one.
• Comprehensive Case Management: We handle both your criminal case and your ALR hearing, providing seamless defense across all proceedings. We also assist clients with finding required DWI education courses and installing ignition interlock devices when necessary, guiding you through every step of the process.

Frequently Asked Questions

Q: How do no-refusal weekends work in San Antonio and what does a mandatory blood draw mean for my defense?
A: San Antonio law enforcement — including SAPD and the Bexar County Sheriff’s office — conducts no-refusal enforcement periods during high-traffic weekends including holidays, major sporting events, and Fiesta. During a no-refusal period, prosecutors and judges are on standby around the clock to issue blood draw warrants within minutes of an arrest when a driver refuses a breath test. The process works like this: you are arrested for DWI, you decline the breathalyzer, law enforcement contacts the on-call prosecutor who applies to the on-call magistrate for a warrant, the warrant is issued electronically, and a phlebotomist draws your blood — all within a compressed window, sometimes under an hour. For your defense, a mandatory blood draw produces a different evidentiary record than a breath test, and it creates specific challenges to pursue. The warrant itself must be reviewed for constitutional sufficiency — was there actually probable cause established in the warrant application, and did law enforcement follow the proper procedure in obtaining it? The blood draw procedure must comply with Texas Transportation Code Section 724.017, which requires the draw be performed by qualified medical personnel using proper techniques. The chain of custody from draw to laboratory must be documented and unbroken. The DPS crime laboratory’s analysis methodology and the specific analyst’s qualifications are subject to challenge. Blood evidence in a no-refusal case is not automatically conclusive — it is a piece of physical evidence subject to the same scrutiny as any other, and we pursue every available challenge to its integrity and reliability.

Q: What is a DWI with child passenger charge in Texas and how is it more serious than a standard DWI?
A: Driving while intoxicated with a child passenger under Texas Penal Code Section 49.045 is a state jail felony — a significant escalation from the Class B misdemeanor that applies to a first-offense standard DWI. The charge applies when a person is operating a motor vehicle in a public place while intoxicated and a passenger in the vehicle is younger than 15 years of age. The elevation to felony status is automatic regardless of whether it is the driver’s first DWI offense, and it carries a sentence of 180 days to two years in a state jail facility plus a fine of up to ten thousand dollars. The consequences beyond the criminal penalty are significant: a felony conviction triggers the same civil rights losses as any Texas felony, affects professional licensing in ways a misdemeanor DWI does not, and in cases involving children, may trigger a separate investigation by Texas Child Protective Services independent of the criminal case. A CPS investigation can result in findings that affect parental rights and custody arrangements entirely apart from the criminal proceedings. We treat DWI with child passenger cases as the serious, multi-track matters they are — addressing the criminal defense strategy, monitoring and responding to any parallel CPS involvement, and evaluating the immigration, professional licensing, and family law implications simultaneously from the first day of representation.

Q: How does a DWI arrest in Bexar County affect a commercial driver’s license?
A: A DWI arrest triggers CDL consequences that operate entirely separately from and in addition to the standard driver’s license suspension. Under federal regulations enforced by the Federal Motor Carrier Safety Administration, a CDL holder who is convicted of operating any vehicle — not just a commercial vehicle — while intoxicated faces a one-year CDL disqualification for a first offense. If the DWI occurred while operating a commercial motor vehicle transporting hazardous materials, the disqualification period extends to three years for a first offense. A second DWI conviction at any point in the CDL holder’s life results in lifetime CDL disqualification. These federal disqualification periods apply regardless of what the Texas administrative license revocation process produces and regardless of whether a Texas state occupational license is obtained — the CDL cannot be used during the federal disqualification period even if an occupational license is otherwise in effect. The practical consequence is that for professional drivers whose livelihood depends entirely on their CDL, a DWI conviction is often more economically devastating than the criminal penalties. The defense strategy in CDL DWI cases must account for both the criminal case and the administrative license proceedings from day one, because the evidentiary record developed in the ALR hearing — including the opportunity to cross-examine the arresting officer under oath — directly affects the criminal case, and the criminal case outcome determines whether the federal disqualification period is triggered.

Q: What is the difference between a breath test and a blood test in a San Antonio DWI case, and which produces stronger evidence for the prosecution?
A: The two types of chemical tests produce different kinds of evidence and present different defense opportunities. A breath test measures the concentration of alcohol in deep lung air and uses a conversion formula to estimate blood alcohol concentration — the Intoxilyzer 9000 is the instrument used by most Texas law enforcement agencies. The breath test result is an indirect measurement, and its accuracy depends on the instrument’s calibration and maintenance history, the officer’s proper administration of the test, whether the defendant had any mouth alcohol contamination, and whether any medical conditions — acid reflux, diabetes, or certain dental work — affected the result. Breath test records and calibration logs are obtainable through discovery and frequently contain maintenance gaps or calibration irregularities that support a challenge to the instrument’s reliability. A blood test directly measures the alcohol concentration in the blood sample and is generally considered more scientifically reliable than a breath test when properly conducted. However, it presents its own defense opportunities: the chain of custody from draw to laboratory must be documented at every step; the blood sample must be properly preserved and stored; the laboratory analyst’s methodology and credentials must be verified; and the possibility of fermentation within the sample tube after collection — which can artificially elevate the measured BAC — must be evaluated based on the storage conditions and the time between draw and analysis. In our experience, blood test cases are not more difficult to defend than breath test cases — they are differently difficult. Both types of evidence require the same systematic, document-by-document review that we conduct in every DWI case we accept.

Q: What is boating while intoxicated in Texas and how is it prosecuted in Bexar County?
A: Boating while intoxicated under Texas Penal Code Section 49.06 applies to operating a watercraft — including motorboats, jet skis, sailboats, and any vessel propelled by wind or motor — in a public place while intoxicated. The definition of intoxication is identical to the standard DWI definition: a BAC of .08 or higher, or loss of normal use of mental or physical faculties due to alcohol, controlled substances, or a combination of both. A first-offense BWI is a Class B misdemeanor carrying the same penalty range as a first-offense DWI — up to 180 days in jail and a two-thousand-dollar fine. Like DWI, BWI can escalate to higher classifications based on prior convictions or injury caused to another person, and intoxication assault or intoxication manslaughter charges apply in watercraft incidents that result in serious injury or death. One significant difference from DWI: a BWI conviction does not trigger the same automatic driver’s license consequences that a DWI does, because the offense involves a watercraft rather than a motor vehicle on a public road. However, it can still be used as a prior intoxication offense to enhance a subsequent DWI or BWI charge. In Bexar County, BWI enforcement is conducted primarily on Canyon Lake and other area waterways, and arrests frequently occur during summer weekends when law enforcement presence on the water is concentrated. The same constitutional issues that apply in DWI stops — probable cause for the initial contact, proper administration of field sobriety tests on an unstable surface, chain of custody for any chemical evidence — are equally applicable in a BWI defense.

Q: How does Bexar County handle a DWI arrest that involves a minor accident with property damage but no injury?
A: A DWI arrest arising from a traffic accident — even one involving only property damage with no physical injury to any person — changes the evidence landscape of the case in several specific ways. The accident itself typically generates additional documentation: accident reconstruction photographs taken by responding officers, a crash report required by Texas Transportation Code Section 550.062, potential surveillance or dashcam footage from surrounding vehicles, and witness accounts from other drivers and bystanders who may have observed the driving behavior before the collision. In terms of the criminal charge, the accident itself does not elevate a DWI to a higher classification when the only damage is property — the enhancement to intoxication assault requires serious bodily injury to a person, not property damage. However, the accident’s occurrence creates an aggravating factor that prosecutors frequently use to argue for a harsher plea offer or sentence recommendation. Civil liability also runs parallel to the criminal case — the other driver’s insurance carrier may pursue a claim, and any statement made to law enforcement at the accident scene about how the crash occurred can be used in both the criminal proceeding and the civil claim. We advise clients from the first consultation to say nothing about the circumstances of the accident to anyone other than their attorney, because the statements made at an accident scene without legal guidance create evidentiary problems in both proceedings simultaneously. Call us at 210-500-0000 any time — we are available around the clock for active arrest situations and DWI emergencies in Bexar County.

Q: What are the ignition interlock device requirements after a DWI in Texas and how long do they last?
A: Ignition interlock requirements in Texas DWI cases arise in two separate contexts — as a condition of bond during the pendency of the case, and as a condition of license reinstatement after conviction. On the bond side, a magistrate in Bexar County has authority to impose an ignition interlock as a bond condition at the initial magistration hearing, which means the requirement can take effect before the case has been resolved and before any conviction has occurred. Challenging an excessive or unjustified interlock bond condition is one of the earliest motions we file in DWI cases when the requirement is not supported by the specific facts of the arrest. On the conviction side, Texas Transportation Code Section 521.246 requires installation of a court-ordered ignition interlock as a condition of any restricted license issued following a DWI conviction, and certain DWI convictions trigger a mandatory interlock requirement as part of the sentence itself. A second DWI conviction requires the interlock as a condition of any subsequent license reinstatement regardless of whether the court specifically orders it. The interlock device requires the driver to provide a breath sample before the vehicle will start and at random intervals while driving — a failed test or a tampered device generates a report that can trigger a bond violation, a probation revocation proceeding, or a license suspension depending on the stage of the case. The interlock requirement typically lasts for the period specified in the court’s order or the DPS reinstatement conditions, commonly ranging from six months to two years depending on the offense history. Understanding when and why these requirements apply — and how to minimize their duration and scope — is part of the comprehensive DWI defense strategy we provide from the first consultation.

Take Immediate Action to Protect Your Future

Time is not on your side after a DWI arrest. The 15-day deadline for your ALR hearing is absolute, and the prosecution begins building its case immediately.

Do not discuss your case with anyone except your attorney. Do not plead guilty at your arraignment without first consulting with us. Exercise your right to remain silent and your right to legal counsel.

Contact Barton & Associates today for a confidential, free phone consultation. Let us review the details of your arrest and start building your defense. Complete our online contact form for a quick response, or call our office directly at 210-500-0000 to check attorney availability for an immediate consultation. Your driving privileges, your criminal record, and your future are worth fighting for.

Main Category: Criminal Defense
Barton & Associates, Attorneys at Law
115 Camaron St, San Antonio, TX 78205
Office: 210-500-0000