DWI Defense Lawyer in Houston

Aggressive Defense When Your Freedom and Future Are on the Line

A DWI arrest in Houston can upend your life in an instant. One moment you’re driving home, and the next you’re facing criminal charges that could mean jail time, thousands of dollars in fines, a suspended driver’s license, and a criminal record that follows you for years. The stakes are high, and the Texas criminal justice system does not go easy on drunk driving offenses.

At Drehner Law, our Houston DWI lawyer understands exactly what you’re up against because Attorney Shannon Drehner spent years on the other side of the courtroom as a former chief felony prosecutor. That prosecutorial experience means she knows how the state builds DWI cases, where their evidence is strongest, and more importantly, where it’s vulnerable. She uses that insider knowledge to develop defense strategies that give her clients the strongest chance of getting charges dismissed, reduced, or resolved favorably.

What makes our DWI defense lawyer in Houston different:

• A former chief felony prosecutor who understands how Harris County prosecutors build and evaluate DWI cases from the inside
• A proven track record of results in DWI cases ranging from first-time offenses to felony DWI and intoxication manslaughter charges
• Aggressive, personalized defense strategies tailored to the specific facts and evidence in your case
• Availability to take your call when you need answers most, including after a DWI arrest

If you’ve been arrested for DWI in Houston, TX or anywhere in Harris County, the decisions you make in the next few days will shape the outcome of your entire case. Contact Drehner Law at 832-626-0063 for a free consultation with a DWI defense lawyer who will fight to protect your freedom, your driving privileges, and your future.

How Texas DWI Laws Define Driving While Intoxicated

Understanding how Texas defines DWI is essential to understanding the charges you’re facing and the defense strategies available to you. Texas DWI laws cast a wider net than many people realize, and a Houston DWI attorney can help you see exactly where the prosecution’s case may have weaknesses.

What Constitutes a DWI in Texas?

Under the Texas Penal Code, a person commits a DWI offense when they operate a motor vehicle in a public place while intoxicated. Texas defines intoxication in two ways: having a blood alcohol concentration of 0.08% or higher, or not having the normal use of mental or physical faculties due to the introduction of alcohol, a controlled substance, a drug, a dangerous drug, or any combination of these substances.

This means you can be charged with DWI even if your BAC is below 0.08%. If an officer believes your ability to drive was impaired by any substance, that subjective assessment can form the basis of criminal charges. This is an important distinction that many people don’t understand until they’re already facing charges in the Harris County court system.

DWI vs. DUI in Texas

Texas treats DWI and DUI as separate offenses. A DUI charge in Texas applies specifically to minors under 21 who are found operating a vehicle with any detectable amount of alcohol in their system. Because it is illegal for anyone under 21 to consume alcohol, the threshold for a DUI is essentially zero tolerance. DWI charges apply to adults 21 and over, as well as to minors whose impairment level meets the standard DWI definition.

Commercial Driver Standards

Commercial vehicle operators are held to a stricter standard under Texas law. A BAC of 0.04% or higher while operating a commercial vehicle constitutes a DWI offense, which can result in the loss of a commercial driver’s license and the end of a career in trucking, delivery, or any other profession requiring a CDL.

Our DWI defense lawyer in Houston will examine every element of how the state defines your alleged offense and identify the strongest angles for challenging the charges against you.

DWI Penalties in Texas: What You’re Really Facing

The penalties for a DWI conviction in Texas are severe and escalate dramatically with each subsequent offense and with the presence of aggravating factors. Understanding the full range of potential consequences helps you see why investing in an experienced Houston DWI lawyer is so critical.

First DWI Offense (Class B Misdemeanor)

• Up to 180 days in jail with a minimum of 72 hours if convicted
• Fines of up to $2,000 plus an additional surcharge of $3,000 payable to the state
• Driver’s license suspension of up to one year
• Possible installation of an ignition interlock device
• Up to 100 hours of community service
• Mandatory DWI education program

First DWI With BAC of 0.15% or Higher (Class A Misdemeanor)

• Up to one year in jail
• Fines of up to $4,000 plus a $6,000 state surcharge
• Driver’s license suspension of up to one year
• Mandatory ignition interlock device installation
• Enhanced scrutiny from prosecutors who treat high-BAC cases more aggressively

Second DWI Offense (Class A Misdemeanor)

• Up to one year in jail with a minimum of 30 days
• Fines of up to $4,000 plus a $4,500 state surcharge
• Driver’s license suspension of up to two years
• Mandatory ignition interlock device
• Mandatory DWI intervention program

Third DWI Offense (Third-Degree Felony)

• Two to ten years in state prison
• Fines of up to $10,000 plus applicable surcharges
• Driver’s license suspension of up to two years
• Felony conviction on your permanent criminal record
• Loss of the right to possess firearms
• Significant impacts on employment, housing, and professional licensing

DWI With a Child Passenger (State Jail Felony)

• 180 days to two years in a state jail facility
• Fines of up to $10,000
• Potential child endangerment charges and CPS involvement
• Driver’s license suspension

Intoxication Assault (Third-Degree Felony)

• Two to ten years in prison
• Fines of up to $10,000
• Driver’s license suspension of up to two years
• Civil liability to the injured victim

Intoxication Manslaughter (Second-Degree Felony)

• Two to 20 years in prison
• Fines of up to $10,000
• Driver’s license suspension of up to two years
• Permanent felony record

Beyond these direct penalties, a DWI conviction creates consequences that reach into every area of your life. Employment opportunities shrink dramatically, professional licenses can be revoked, insurance premiums skyrocket, and the social stigma of a criminal conviction affects personal relationships and community standing. A Houston DWI attorney at Drehner Law fights to help you avoid these outcomes through aggressive defense tailored to the specifics of your case.

How a Houston DWI Lawyer Challenges the Evidence Against You

DWI cases may seem straightforward to prosecutors, but every case has potential weaknesses that an experienced criminal defense attorney knows how to exploit. The evidence the state relies on, from the initial traffic stop to the breath test or blood test results, is far more vulnerable to challenge than most people realize.

Challenging the Traffic Stop

Every DWI case begins with a traffic stop, and law enforcement must have a valid legal reason for pulling you over. If the officer lacked reasonable suspicion that a traffic violation or criminal activity was occurring, everything that followed the stop may be inadmissible. Our DWI defense lawyer will review dashcam footage, body camera recordings, and the officer’s written report to determine whether the stop was legally justified. If it wasn’t, we can file a motion to suppress all evidence obtained as a result, which frequently leads to charges being dismissed entirely.

Challenging Field Sobriety Tests

Standardized field sobriety tests are one of the primary tools officers use to establish probable cause for a DWI arrest, but these tests are far from reliable. The three standardized tests — the horizontal gaze nystagmus test, the walk-and-turn test, and the one-leg stand test — are influenced by many factors that have nothing to do with intoxication:

• Physical disabilities, injuries, and medical conditions that affect balance and coordination
• Fatigue, nervousness, and anxiety during a roadside encounter with law enforcement
• Uneven road surfaces, poor lighting, and weather conditions at the time of testing
• The officer’s subjective interpretation of your performance
• Improper administration of the tests that deviates from standardized protocols

Field sobriety tests are designed to be difficult even for sober individuals, and studies have shown that officers frequently misinterpret the results. A Houston DWI attorney who understands the science behind these tests and the protocols officers must follow can effectively challenge this evidence at trial.

Challenging Breath Test Results

Breath testing devices must be properly calibrated, maintained, and operated according to strict protocols for the results to be admissible in court. Common issues that our defense team investigates include:

• Whether the device was calibrated within the required timeframe
• Whether the officer observed you for the mandatory 15-minute deprivation period before administering the test
• Whether medical conditions like acid reflux, diabetes, or certain diets produced a falsely elevated reading
• Whether environmental factors such as chemicals, paint fumes, or other substances affected the results
• Whether the officer was properly certified to administer the breath test

Challenging Blood Test Results

Blood tests are generally considered more accurate than breath tests, but they are not infallible. The chain of custody must be maintained from the moment your blood is drawn through laboratory analysis, and breaks in this chain create opportunities to challenge the results. Additionally, improper storage, contamination, fermentation of the sample, and laboratory errors can all produce inaccurate BAC readings.

Our criminal defense lawyers at Drehner Law conduct independent investigations into every piece of evidence the prosecution intends to use, identifying every available avenue to raise reasonable doubt and fight for the best possible outcome.

The DWI Legal Process in Harris County: What to Expect

Understanding how the legal process unfolds after a DWI arrest in Houston helps you make informed decisions at every stage and avoid mistakes that could hurt your case. The Texas DWI process involves both criminal proceedings and an administrative driver’s license hearing, and both require immediate attention.

The Administrative License Revocation (ALR) Hearing

After a DWI arrest, you have only 15 days to request an ALR hearing to challenge the suspension of your driver’s license. If you fail to request this hearing within the deadline, your license will be automatically suspended. This hearing is separate from your criminal case and takes place before an administrative law judge.

An ALR hearing is also a valuable opportunity for your DWI defense lawyer to preview the prosecution’s evidence. Your attorney can subpoena the arresting officer, question them under oath, and obtain discovery that may reveal weaknesses in the state’s criminal case against you.

Arraignment and Bond Conditions

After your arrest, you’ll appear before a judge for arraignment, where the charges are formally read, and bond conditions are set. A Houston DWI attorney who gets involved early can advocate for reasonable bond conditions and ensure you’re not subjected to unnecessary restrictions while your case is pending.

Pre-Trial Investigation and Motions

This is where the bulk of your defense strategy takes shape. Your criminal defense attorney will:

• Obtain and review all evidence, including police reports, dashcam and body camera footage, DWI testing records, and witness statements
• File motions to suppress evidence that was obtained in violation of your constitutional rights
• Challenge the validity of field sobriety tests, breath tests, and blood tests
• Identify procedural errors that could lead to charges being dismissed or reduced
• Negotiate with prosecutors for reduced charges or alternative sentencing when appropriate

Trial or Resolution

If a fair resolution cannot be reached through negotiation, your case proceeds to trial. At trial, the prosecution must prove every element of the DWI charge beyond a reasonable doubt. Our DWI defense lawyer in Houston has the courtroom experience and legal knowledge to present a compelling defense that challenges the state’s evidence and fights for an acquittal.

Beyond a DWI Conviction: The Long-Term Consequences Most People Don’t Consider

The penalties imposed by the court represent only part of what a DWI conviction costs you. The long-term consequences affect nearly every area of your life and can persist for years or even permanently.

Employment and career impact. A DWI conviction appears on criminal background checks, making it harder to secure employment in many industries. Positions requiring driving, security clearances, professional licenses, or public trust become significantly more difficult to obtain. For commercial drivers, a DWI conviction can end a career entirely.

Financial consequences beyond fines. Between court costs, surcharges, DWI education programs, ignition interlock device installation and maintenance, increased insurance premiums, and potential loss of income, the total financial impact of a DWI conviction often reaches $15,000 to $25,000 or more over several years.

Insurance rate increases. Texas requires individuals convicted of DWI to obtain an SR-22 certificate of financial responsibility, and insurance companies dramatically increase premiums for drivers with DWI convictions. These elevated rates can persist for three to five years or longer.

Professional licensing consequences. Healthcare workers, attorneys, teachers, commercial drivers, real estate agents, and other licensed professionals may face disciplinary action, license suspension, or denial of licensure renewal as a result of a DWI conviction.

Personal and family impact. The stress of criminal proceedings, potential incarceration, and the stigma associated with a DWI conviction can strain relationships with a spouse, children, and other family members. Custody arrangements may also be affected if a family member raises concerns about the conviction during family court proceedings.

Immigration consequences. For non-citizens, a DWI conviction can trigger deportation proceedings, denial of visa renewal, or denial of naturalization applications, making experienced legal representation critical.

These consequences underscore why fighting a DWI charge with every available defense is so important. A conviction doesn’t just affect your present — it reshapes your future.

Why Attorney Shannon Drehner Is the Houston DWI Lawyer You Need

When your freedom, driving privileges, and future are at stake, the criminal defense attorney you choose matters more than almost any other decision you’ll make. Attorney Shannon Drehner brings a rare combination of prosecutorial insight, courtroom experience, and genuine dedication to her clients that sets Drehner Law apart from other Houston DWI defense firms.

Former chief felony prosecutor. Before dedicating her career to criminal defense, Attorney Drehner served as a chief felony prosecutor in the Harris County criminal justice system. She personally prosecuted DWI cases, which means she understands exactly how the state builds its case, what evidence prosecutors rely on most heavily, and where their arguments are most vulnerable to attack. This perspective gives her DWI defense clients a strategic advantage that most defense attorneys simply cannot offer.

Extensive DWI defense experience. Attorney Drehner has defended clients against every level of DWI charge, from first-time misdemeanor offenses to felony DWI, intoxication assault, and intoxication manslaughter cases. Her experience across the full spectrum of DWI cases in Houston, TX means she’s prepared for whatever complexities your case presents.

A hands-on approach to every case. At Drehner Law, your case isn’t handed off to a junior associate or paralegal. Attorney Drehner personally handles every aspect of your defense, from the initial consultation through the resolution of your case. You’ll work directly with her throughout the entire process, and she’ll be available to answer your questions and address your concerns at every stage.

Results that speak for themselves. Our law firm has successfully achieved case dismissed outcomes, reduced charges, acquittals, and favorable resolutions for clients across Harris County and Houston, Texas. While no attorney can guarantee a specific result, Attorney Drehner’s proven track record demonstrates her ability to deliver meaningful results in even the most challenging DWI cases.

Contact Our DWI Defense Lawyer in Houston Today

If you’ve been arrested for DWI in Houston, Harris County, or anywhere in the surrounding area, time is critical. You have only 15 days to request an ALR hearing to protect your driving privileges, evidence can deteriorate or disappear quickly, and the prosecution is already building their case against you. The sooner you have an experienced Houston DWI attorney on your side, the more options you have.

Getting started is simple:

1. Call 832-626-0063 to schedule a free consultation
2. Tell us what happened — we’ll listen to every detail of your arrest and provide an honest assessment of your case
3. Let us fight for you — while you focus on your life and your family, we’ll handle the legal system, challenge the evidence, and pursue the best possible outcome

At Drehner Law, we understand that a DWI arrest doesn’t define who you are. Good people make mistakes, and everyone deserves aggressive, knowledgeable legal representation. Attorney Shannon Drehner has built her career on defending the rights of people just like you, and she’s ready to put her legal experience and prosecutorial insight to work on your behalf.

Don’t face DWI charges alone. Contact Drehner Law at 832-626-0063 today for a free consultation with a DWI defense lawyer in Houston who will fight for your freedom, your license, and your future.