San Antonio DWI Lawyers
Trey Porter | Last Reviewed: July 2026
Trey Porter Law represents people arrested for Driving While Intoxicated in Bexar County criminal courts in San Antonio.
Founded in 2017, the firm has earned more than 900 five-star reviews across Google and Avvo.
San Antonio DWI attorney Trey Porter has 15 years of experience defending DWI cases in Bexar County courts and serves as lead counsel on the firm’s San Antonio DWI cases.
Trey Porter Law’s DWI attorneys have won acquittals at trial, secured dismissals in cases involving commercial driver’s licenses, breath tests, blood tests, refusals, and crashes, and won motions to suppress evidence in San Antonio DWI cases.
If you’ve been arrested for DWI in San Antonio, you have 15 days to request an ALR hearing to stop a driver’s license suspension.
Call 210-673-1180 for a free, same-day consultation. You can’t change what happened, but you can change what happens next.
Powerful Defense. Proven Results.
- 1,000+ criminal and DWI cases resolved across Texas
- Dismissals secured in Bexar County DWI cases through suppression motions
- Reductions negotiated in San Antonio felony and misdemeanor DWI cases
Trey Porter San Antonio DWI Attorney
Trey Porter leads the firm’s DWI docket in San Antonio. He graduated from St. Mary’s University School of Law on San Antonio’s West Side, and has worked alongside many of Bexar County’s prosecutors and judges for over 15 years.
- Voted one of San Antonio’s Best DWI Lawyers by Scene in SA Magazine, based on peer voting from local judges, prosecutors, and fellow attorneys.
- Licensed by the Supreme Court of Texas to practice in Texas District, County, Municipal, and Justice courts statewide.
- Resolved more than 1,000 criminal and DWI cases, from first-offense misdemeanors to serious felony cases.
Technical and Forensic Background
Trey Porter is a NHTSA-Certified Practitioner in Standardized Field Sobriety Testing and has completed continuing legal education on gas chromatography, the Intoxilyzer 9000, infrared spectroscopy, breath alcohol concentration testing, and the scientific methods used in DWI breath and blood cases.
Publications, Recognition, and Memberships
Trey Porter has written extensively about Texas DWI law. His work and legal analysis have appeared in the San Antonio Report, SA Woman Magazine, KSAT (ABC San Antonio), WOAI (NBC San Antonio), KABB (FOX San Antonio), Forbes, and USA Today. The San Antonio Express-News and MySA.com have also cited his analysis of Texas DWI law. He’s been recognized by Texas Super Lawyers and holds a 10.0 Justia rating.
His active professional memberships include:
- National Association of Criminal Defense Lawyers (NACDL)
- National College for DUI Defense (NCDD)
- San Antonio Criminal Defense Lawyers Association (SACDLA)
- Texas Criminal Defense Lawyers Association (TCDLA)
- DUI Defense Lawyers Association (DUIDLA)
San Antonio and Bexar County Courtroom Experience
Trey Porter Law is located downtown at 816 Camaron St., Suite 124, San Antonio, TX 78212 in the historic Finesilver building.
The firm’s San Antonio DWI attorneys each have more than a decade of experience defending DWI charges in San Antonio, have earned more than 500 five-star Google reviews and 400 five-star Avvo reviews, and were voted a Top 5 DUI Law Firm in the San Antonio Current.
Trey Porter Law regularly appears in Bexar County criminal courts at the Cadena-Reeves Justice Center next to the historic Bexar County Courthouse. The firm also handles ALR hearings before the State Office of Administrative Hearings and represents clients in occupational driver’s license matters in Bexar County justice courts.
DWI and Intoxication Offenses Represented
Trey Porter Law represents people charged with the following DWI crimes in Bexar County:
- DUI for Minors
- First-Offense DWI
- DWI with a BAC of 0.15 or higher
- DWI Second
- Felony DWI Third or more
- DWI with a Child Passenger
- Intoxication Assault
- DWI cases involving breath tests, blood draws, refusals, and crashes
- Commercial driver’s license holders facing DWI charges and CDL disqualification
Results Matter Most
“I can’t say enough good things about the team at Trey Porter Law. What really stood out was how hard they worked on my case. It never felt like they were just going through the motions—they were intentional, strategic, and clearly focused on getting the best possible outcome for me. Thanks to their dedication and expertise, my DUI case was dismissed. That alone speaks volumes.”
“Would recommend Trey Porter law! They were very knowledgeable and explained everything every step of the way. They stayed in touch with me and helped take the worry about my case away. First time in trouble with the law and they got my case dropped. 10/10 recommend!!”
“Trey Porter Law handled my case with outstanding professionalism from start to finish. Their team was responsive, confident, and truly knew what they were doing. They walked me through every step of the process, made sure I understood my options, and ultimately delivered the best possible outcome for my case.”
What Should You Do After a DWI Arrest in San Antonio?
Contact a San Antonio DWI lawyer immediately, request an ALR hearing within 15 days, and follow every bond condition.
Contact a San Antonio DWI Lawyer Immediately
Early legal help allows an attorney to protect your driver’s license, preserve video evidence from the traffic stop and jail, and begin preparing the defense before the first court setting.
Request an ALR Hearing Within 15 Days of Arrest
After a DWI arrest, the Texas Department of Public Safety initiates a separate Administrative License Revocation (ALR) case that can suspend your driver’s license even while the criminal case is pending. These hearings are conducted by the State Office of Administrative Hearings. At the hearing, the arresting officer may be questioned under oath about the traffic stop, arrest, and chemical testing procedures used in the investigation.
Follow All Bond Conditions
After arrest, you are taken to Bexar County Central Magistration inside the South Tower of the Bexar County Jail, where a magistrate judge reviews the arrest, sets bond, and imposes release conditions. Bond conditions often include ignition interlock devices, alcohol testing, and reporting to Bexar County Pretrial Services.
DWI cases are assigned to the Bexar County Criminal Courts at the Cadena-Reeves Justice Center, with the first court setting typically about 30 days after arrest. Violating bond conditions can result in an arrest warrant.
How Can a DWI Charge Be Dismissed in San Antonio?
Challenging the evidence is the most effective way to have a DWI charge dismissed in San Antonio. Prosecutors at the Bexar County District Attorney’s Office must prove all elements of Driving While Intoxicated beyond a reasonable doubt. When the evidence can’t meet that burden of proof, the DWI can be dismissed.
Dismissal Strategies for San Antonio DWI Cases:
- Challenge the Traffic Stop
Lack of reasonable suspicion or prolonged detention may violate the Fourth Amendment protection against unlawful search and seizure. When a stop is unlawful, Trey Porter Law files a motion to suppress evidence. Anything obtained after an illegal arrest is the fruit of a poisonous tree. - Challenge Probable Cause for Arrest
Unreliable field sobriety tests or inconsistencies between body camera video and police reports may undermine probable cause for arrest. - Challenge Breath and Blood Test Evidence
Violations of chemical testing procedures or breaks in the blood sample chain of custody can undermine the reliability of chemical test evidence. - Enforce Discovery Obligations
Failure to disclose evidence required by Texas Code of Criminal Procedure Article 39.14 and Brady v. Maryland may violate due process and weaken the prosecution’s case.
Can a DWI Be Dismissed in San Antonio?
Yes. A DWI can be dismissed in San Antonio. Prosecutors in Bexar County must prove every element of Driving While Intoxicated beyond a reasonable doubt. Dismissals occur when the defense exposes constitutional violations or weaknesses in the State’s evidence.
Trey Porter Law’s Bexar County Dismissal Strategies:
- No Refusal blood draw challenges under the Fourth Amendment protection against unlawful searches and seizures.
- Sixth Amendment speedy trial violations when delays prejudice the defendant.
- Confrontation Clause cross-examination of San Antonio Police officers and Texas Department of Public Safety forensic witnesses.
- Discovery enforcement under Texas Code of Criminal Procedure Article 39.14.
- Brady v. Maryland, 373 U.S. 83 (1963) disclosure obligations requiring prosecutors to turn over potentially exculpatory evidence.
When constitutional violations or unreliable evidence are uncovered, Trey Porter Law files motions to suppress evidence and has secured DWI dismissals in the Bexar County Criminal Courts.
What Are The DWI Penalties in San Antonio?
The penalties for a DWI in San Antonio can include jail time, supervised probation, thousands of dollars in fines, driver’s license suspension, and a permanent criminal record. Texas law increases penalties based on prior offenses, and charges can become more serious when a case involves a high blood alcohol concentration, a crash, or other aggravating factors.
- First Offense DWI
Texas Penal Code § 49.04 — Class B Misdemeanor
Jail: 72 hours to 180 days
Fine: up to $2,000
Driver’s license consequences: up to 1 year of suspension - DWI with BAC 0.15 or Higher
Texas Penal Code § 49.04(d) — Class A Misdemeanor
Jail: up to 1 year
Fine: up to $4,000
Driver’s license consequences: up to 1 year of suspension - DWI with Child Passenger
Texas Penal Code § 49.045 — State Jail Felony
Jail: 180 days to 2 years
Fine: up to $10,000
Driver’s license consequences: additional suspension consequences may apply - DWI Third Offense
Texas Penal Code § 49.09 — Third Degree Felony
Prison: 2 to 10 years
Fine: up to $10,000
Driver’s license consequences: up to 2 years of suspension
In Bexar County, judges at the Cadena-Reeves Justice Center often impose strict bond and probation conditions in DWI cases, including ignition interlock devices, alcohol education programs, community service, and alcohol or drug testing, with even stricter supervision commonly ordered for repeat offenses.
For a deeper explanation of Texas DWI law, offense levels, and defense strategies, see the Texas DWI lawyers page.
Facing a Driver’s License Suspension?
Trey Porter Law handles driver’s license issues for clients in San Antonio. Submit a form or call 210-673-1180 to talk today.
Trey Porter Law’s San Antonio DWI Defense Services
Trey Porter Law represents San Antonio DWI clients in Bexar County criminal courts, Texas DPS driver’s license suspension proceedings, Bexar County Justice of the Peace courts, and DWI record clearing matters.
Criminal DWI Charges
The firm defends intoxication offenses prosecuted in Bexar County Criminal Courts including:
- Driving While Intoxicated (DWI) — Tex. Penal Code §49.04
- DWI BAC 0.15 or higher — §49.04(d)
- DWI Second or Subsequent — §49.09
- DWI with Child Passenger — §49.045
- Intoxication Assault — §49.07
- Intoxication Manslaughter — §49.08
Driver’s License Defense
A San Antonio DWI arrest also triggers a separate driver’s license suspension case with the Texas Department of Public Safety. Trey Porter Law represents clients in:
- Administrative License Revocation (ALR) hearings challenging DPS license suspension
- Occupational driver’s license petitions allowing limited driving during suspension
Professional and Personal Consequences
DWI arrests create issues beyond the criminal case. Trey Porter Law understands life has to go on while the San Antonio DWI process plays out. The firm regularly provides advice regarding:
- Professional licensing board disclosure issues for nurses, teachers, physicians, CDL drivers, real estate license professionals, and engineers.
- Employer reporting and workplace discipline concerns.
- University disciplinary proceedings.
- Military service member reporting and discipline.
Clearing DWI Arrest Records
Trey Porter Law regularly clears San Antonio DWI arrest records when clients qualify under Texas law. Expunction deletes the record, while nondisclosure seals it from public view.
- Orders of Nondisclosure — Texas Government Code §411.0731
- Expunction — Texas Code of Criminal Procedure Chapter 55A
DWI Consequences for Military Service Members in San Antonio
Service members stationed at Joint Base San Antonio Fort Sam Houston, Lackland Air Force Base, and Randolph Air Force Base who are arrested for DWI can face dual jurisdiction: a civilian criminal case in Bexar County and military disciplinary action under the Uniform Code of Military Justice UCMJ.
Possible consequences include:
- Security Clearance Suspension Or Revocation
- Article 15 Proceedings Or Administrative Separation Under The UCMJ
- Deployment Restrictions Or Loss Of On Base Driving Privileges
- Discharge Depending On Command Action And Case Outcome
Trey Porter Law represents service members stationed at Joint Base San Antonio in Bexar County courts and coordinates with military defense counsel to protect both the civilian case and the service member’s career.
Arrested for DWI in San Antonio?
Trey Porter Law offers free DWI consultations. You can’t change what happened, but you can change what happens next. Submit a form or call 210-673-1180 to talk today.