Why Hire A DWI Lawyer?
Last updated on June 2, 2026
A DWI arrest can put your license, freedom, record and future at risk. Even a first offense can lead to jail time, fines, driver’s license suspension, an ignition interlock requirement and a criminal record that can follow you for years.
At The Sanchez Law Firm, we defend people facing DWI charges throughout the Rio Grande Valley, including McAllen, Edinburg, Mission, Pharr, Weslaco, San Juan and Hidalgo. Attorney Sergio Sanchez brings more than 23 years of criminal law experience and the insight of a former district attorney. Our background helps us understand how prosecutors evaluate DWI cases, where weaknesses often appear and how to push for dismissals, reductions or better outcomes.
DWI Charges That Can Affect Your License, Record And Freedom
In Texas, adult drunk driving is charged as driving while intoxicated, or DWI, under Texas Penal Code §49.04. A first-time DWI may involve jail, fines, court costs, probation, community service and a driver’s license suspension. The consequences can become more severe when aggravating factors are involved, such as:
- BAC of .15% or higher
- Open container allegations
- Crash with injury
- Child passenger
A conviction can also affect employment, professional licensing, insurance rates and background checks.
You Have 15 Days To Protect Your Driver’s License
After a failed or refused breath or blood test, you usually have only 15 days from the notice of suspension to request an Administrative License Revocation hearing. If you do not request a hearing on time, your license may be suspended before your DWI case is resolved.
Our firm contests license suspensions before the State Office of Administrative Hearings (SOAH). At the hearing, we may cross-examine the officer, challenge the basis for the traffic stop, question whether the arrest was lawful and attack the evidence used to support the suspension.
If a suspension cannot be avoided, we can help clients pursue an Occupational Driver’s License so they may still drive for essential needs such as work, school, medical appointments or household responsibilities.
A Strong DWI Defense Starts With The Stop, Tests And Arrest
We look closely at every stage of the arrest, including:
- Reasonable suspicion: Did the officer have a lawful reason to stop the vehicle?
- Probable cause: Did the officer have enough evidence to make the arrest?
- Field sobriety testing: Were the tests properly explained, demonstrated and scored?
- Roadside conditions: Did lighting, traffic, uneven pavement, medical issues or anxiety affect performance?
- Breath testing: Was the Intoxilyzer 9000 properly maintained, calibrated and operated?
- Blood testing: Was there a valid warrant, proper chain of custody and reliable lab procedure?
Standardized field sobriety tests must follow NHTSA standards. These tests include the horizontal gaze nystagmus test, the walk-and-turn test and the one-leg stand test.
Breath and blood tests can also be challenged. With breath tests, we review operator certification, the required observation period, maintenance records and calibration records for the Intoxilyzer 9000.
With blood tests, we examine the warrant, collection process, preservatives, chain of custody and lab methods. We may also raise issues such as rising BAC, retrograde extrapolation and the unreliability of preliminary breath tests.
Early Evidence Can Change The Direction Of A DWI Case
Evidence in a DWI case can disappear quickly. That is why early action matters. Our DWI defense attorney moves quickly to preserve and collect evidence such as:
- Dashcam and bodycam video
- 911 audio
- Jail and booking records
- Surveillance footage
- Witness statements
- Intoxilyzer 9000 logs
- Officer training records
- Lab documentation
- Maintenance and calibration records
These details can expose protocol violations, inconsistencies and gaps in the state’s case.
Local Rio Grande Valley Defense From A Former District Attorney
The Sanchez Law Firm regularly represents clients across the Rio Grande Valley, including McAllen, Edinburg, Mission, Pharr, Weslaco, San Juan and Hidalgo.
Our local experience helps us recognize issues that may appear in Rio Grande Valley DWI cases. These may include traffic stops on I-2 and US-83, uneven shoulder conditions, nightlife patrols, campus-area saturation enforcement and arrests handled through municipal courts, Hidalgo County Courts at Law or District Court.
Trial-Ready Representation When The Stakes Are High
Prosecutors handle cases differently when they know the defense is prepared for trial. We prepare DWI cases with that pressure in mind from the beginning.
Depending on the facts, our strategy may include motions to suppress unlawfully obtained evidence, expert review of field sobriety testing or lab procedures, focused jury selection and detailed cross-examination of officers and analysts.
Not every case goes to trial, but every case benefits from careful preparation. A trial-ready approach can improve negotiation leverage and help clients understand whether a plea, reduction, dismissal strategy or courtroom fight makes the most sense.
Put A Former Prosecutor On Your Side After A DWI Arrest
If you were arrested for DWI in McAllen or anywhere in the Rio Grande Valley, The Sanchez Law Firm brings more than 23 years of criminal defense experience and local courtroom knowledge to DWI cases.
Dial 956-467-5766 or fill out our contact form to speak with a Rio Grande Valley DWI defense lawyer who can review the stop, challenge the evidence and help you understand the next steps in your defense. Hablamos español.