DWI Defense in San Marcos, TX – ALR Hearings, Field Sobriety Tests, and What Happens Next

The night you are booked into Hays County Jail, a 15-day countdown begins that will determine whether your driver's license is automatically suspended. That deadline runs independently of the criminal case — and most people arrested on IH-35 or near the Guadalupe Street bar district never know it exists until it has already passed. Understanding both the license side and the criminal side of a San Marcos DWI is the first step toward building a real defense.

What Is the ALR Hearing and Why Does the 15-Day Deadline Matter?

An Administrative License Revocation (ALR) hearing is your only chance to contest the Texas DPS suspension of your license before it automatically takes effect — and you have exactly 15 days from the date of arrest to request one.

When officers serve you the DIC-25 notice at arrest — either because your breath or blood result was 0.08 or above, or because you refused testing — that document starts the clock. If no hearing request is made, your suspension begins automatically on the 40th day after arrest. A first-offense test failure triggers a 90-day suspension; a refusal triggers 180 days.

Requesting the hearing does more than buy driving time. Once the hearing is scheduled, your attorney can subpoena the arresting officer and lock in their sworn testimony before the criminal case moves forward. That early testimony can reveal weaknesses in the traffic stop, the field tests, or the breath test procedure — weaknesses that later support a motion to suppress evidence in Hays County Court at Law. For DWI/DUI defense representation in San Marcos, acting within that 15-day window is often the single most time-sensitive step in the entire case.

Can Field Sobriety Test Results Be Challenged?

Yes — field sobriety test results are not scientific proof of impairment. They are indicators used to justify an arrest, and they depend heavily on how the officer administered them and the conditions at the scene.

The three standardized tests — Horizontal Gaze Nystagmus (HGN), Walk-and-Turn, and One-Leg Stand — were validated under controlled conditions. A roadside stop on an IH-35 shoulder, a sloped parking lot off Guadalupe St., or a windy night outside a Texas State University event is far from controlled. Poor lighting, uneven pavement, traffic noise, and wind all affect balance test performance independently of alcohol.

Beyond conditions, the officer must follow exact NHTSA protocol for each test. Giving instructions only once, moving the stimulus too quickly during HGN, or failing to observe the subject for the required period before starting can each undermine the result. Physical factors — a prior knee injury, an inner ear condition, age over 65, or certain medications — can mimic the same 'clues' officers are trained to count. When the test was not administered correctly or the environment was not suitable, your attorney can argue that the evidence should be suppressed before trial.

Are Breath and Blood Test Results Airtight?

Breath and blood results can be challenged on procedural and scientific grounds — a reading above 0.08 does not automatically end the defense.

Texas uses the Intoxilyzer 9000 for breath testing. It must be properly calibrated, maintained, and operated by a certified officer. A 15-minute continuous observation period is required before the test is administered; skipping or shortening it can allow mouth alcohol from acid reflux, GERD, or a recent burp to produce an inflated reading. Radio frequency interference is another documented source of error.

Blood draws, now typically requiring a warrant under post-2013 case law, carry their own challenges. Chain of custody gaps, improper storage, contamination, and fermentation in the sample can all affect the result. If the lab analyst's qualifications or methodology are in question, those issues can be raised at a hearing or trial. A high number on a report is a starting point, not the finish line.

How Does the Hays County DWI Court Process Work?

A first or second DWI in San Marcos is filed as a misdemeanor in Hays County Court at Law; a third offense or more moves to Hays County District Court as a felony. The path through the courthouse — at 110 E. San Antonio St. — follows a defined sequence, and a criminal defense attorney in San Marcos works at every stage.

After arraignment, your attorney requests discovery: dashcam footage, bodycam video, BAC records, and the officer's reports. Bodycam and dashcam recordings can be overwritten quickly, which is one reason early legal involvement matters. Once discovery is reviewed, your attorney evaluates whether the traffic stop itself was legally justified. If the stop lacked reasonable suspicion, a motion to suppress can knock out all evidence gathered after it.

One important distinction unique to Texas: deferred adjudication is not available for DWI. Some defendants expect that option, but Texas law bars it for this offense. What may be available, depending on your case and Hays County's current programs, is a pre-trial diversion or negotiated reduction to a lesser charge like obstruction of highway or reckless driving — though Texas prosecutors resist DWI reductions more than in many other states. Whether that path is realistic depends on the strength of the evidence and the specific facts of your arrest.

What Changes Between a First Offense and a Repeat Offense?

The difference between a first DWI and a repeat offense in Texas is not just a higher fine — it is the difference between a misdemeanor and a felony record.

A first offense with a BAC below 0.15 is a Class B misdemeanor carrying up to 180 days in jail and a $2,000 fine. If your BAC was 0.15 or above, that same first arrest becomes a Class A misdemeanor with up to a year in jail and a $4,000 fine. A second DWI is also a Class A misdemeanor. A third offense is a third-degree felony with a sentencing range of 2 to 10 years in prison and up to a $10,000 fine. A DWI with a child passenger in the vehicle is a state jail felony regardless of prior history. Each step up in classification also increases the likelihood of mandatory interlock devices, extended license suspension, and probation conditions that, if violated, trigger a separate legal proceeding.

San Marcos sees elevated DWI enforcement volume tied to Texas State University event weekends, holiday periods, and routine DPS Trooper activity on IH-35 — meaning first-offense arrests are common and the population at risk of repeat exposure is real. The severity of later consequences makes resolving an early charge correctly a long-term financial and personal decision, not just an immediate one.

A strong defense reduces both immediate consequences and the exposure that follows. When evidence can be challenged and suppressed, the state's case weakens — and the outcome reflects that.

Explore your options with the Law Office of Scot Courtney before the 15-day ALR window closes and before the Hays County court process moves forward without your input.