No-Refusal Weekends in San Antonio: Fighting a Blood Warrant

If you refused a breath test during a San Antonio DWI stop and still ended up with your blood drawn anyway, you’ve experienced Bexar County’s “No-Refusal” policy firsthand. It’s one of the more misunderstood parts of a DWI & Intoxication case in this area, and understanding exactly how it works — and where it can still be challenged — matters considerably for your defense.

“No-Refusal Weekend” Is a Misleading Name

Here’s something worth knowing right away: despite the name that’s stuck around in common use, Bexar County’s No-Refusal policy isn’t actually limited to weekends, holidays, or big local events like Fiesta or rodeo season anymore. The policy began in 2008 for specific holiday periods, expanded to cover all weekends by 2011, and by October of that year became a continuous, 24-hour-a-day, 7-day-a-week policy that applies to any DWI arrest, any day of the year. If you were arrested on a random Tuesday afternoon and refused a breath test, the same blood warrant process applies as it would on a Friday night.

How the Blood Warrant Process Actually Works

When someone is arrested for DWI in Bexar County and refuses to voluntarily provide a breath or blood sample, the standard next step is for the arresting officer to seek a search warrant authorizing a blood draw anyway. Bexar County maintains on-call judges specifically so this process can move quickly — an officer can request a warrant from a magistrate, often within a matter of hours of the arrest, and once a judge signs it, the blood draw becomes legally mandatory regardless of the initial refusal.

When Is a Blood Draw “Mandatory” Under Texas Law?

Separate from the general No-Refusal warrant process, Texas Transportation Code Section 724.012(b) identifies specific circumstances where an officer is authorized to require a blood specimen even after a refusal. These generally include: an accident the officer reasonably believes resulted in death or serious bodily injury to someone other than the suspect, requiring the injured person’s transport to a hospital; an arrest specifically for DWI or Boating While Intoxicated with a child passenger; or reliable information that the person has certain qualifying prior convictions, including two or more prior DWI-type convictions.

The Critical Point: “Mandatory” Doesn’t Mean “Without a Warrant”

This is the single most important thing to understand if you’re trying to figure out whether your blood draw was lawful. A common misconception is that these “mandatory” circumstances let police draw blood immediately, without a warrant, simply because the statute uses the word “mandatory.” That’s not accurate.

In Missouri v. McNeely, the United States Supreme Court held that even in these mandatory circumstances, officers generally still need either a valid warrant or genuine emergency circumstances before drawing blood without consent — the natural dissipation of alcohol in the bloodstream, by itself, does not automatically justify skipping the warrant requirement. In practice, this means that even a “mandatory” blood draw in Bexar County usually still involves the same warrant process as any other refusal — just with a strong statutory basis supporting the officer’s request for that warrant. If a blood draw happened without a warrant and without a genuine emergency justifying that decision, that’s a serious, real issue worth your criminal defense attorney examining closely, even in a case that otherwise falls into one of the “mandatory” categories.

There’s a more specific version of this challenge worth knowing about too: at least one Texas appellate court has found that a mandatory draw based solely on a defendant’s prior convictions — without an accident, injury, or child passenger involved — can itself raise the same warrant-requirement concerns established in McNeely. This is a more specialized argument, but it illustrates that the word “mandatory” in the statute is the beginning of the analysis, not the end of it.

Challenging the Warrant Itself

Even when a valid warrant was obtained, that doesn’t end the inquiry. A blood draw warrant still has to hold up to scrutiny, and there are several places where real defects can arise:

The Warrant Affidavit

The officer’s sworn affidavit supporting the warrant request has to establish genuine probable cause. Factual inaccuracies, omissions, or an affidavit that doesn’t actually support the conclusions it draws can be challenged, and a successfully challenged affidavit can render the resulting blood test result inadmissible entirely.

How the Draw Was Performed

Texas law is specific about who is qualified to perform a blood draw and the conditions under which it has to happen — generally a physician, qualified technician, chemist, or nurse, in a sanitary setting. It’s worth being precise here: these specific personnel requirements govern a draw done under the general consent framework in Chapter 724. When a draw happens pursuant to a warrant, Texas courts have held that this specific statutory list doesn’t control the analysis — instead, the draw’s reasonableness is judged under general Fourth Amendment principles. That doesn’t make how the draw was performed irrelevant; it just means the challenge is framed as a broader constitutional reasonableness question rather than a technical violation of the personnel list itself.

Chain of Custody

From the moment blood is drawn to the moment it’s analyzed in a lab, there’s a documented chain of who handled the sample, how it was stored, and what preservatives were used. Gaps or inconsistencies in this chain can raise real questions about whether the sample that was tested is reliably the same sample that was drawn from you.

What This Means for Your Bexar County Case

If your blood was drawn after a refusal, the fact that a warrant was ultimately obtained doesn’t automatically mean the process was handled correctly, and it doesn’t mean the test result is beyond challenge. A close review of the warrant affidavit, the circumstances of the draw itself, and the chain of custody afterward is exactly the kind of work that can uncover a real, case-changing defense — but it requires a genuinely thorough look, not a general assumption that a signed warrant settles the question.

Frequently Asked Questions

Q: Does Bexar County only do blood draws on “No-Refusal Weekends”?
A: No. Despite the name, Bexar County’s No-Refusal policy has been in continuous effect, every day of the year, since October 2011. It’s not limited to weekends, holidays, or specific events.

Q: If my case falls into a “mandatory” blood draw category, does that mean police didn’t need a warrant?
A: Generally, no. Under Missouri v. McNeely, officers generally still need a warrant or a genuine emergency even in these mandatory circumstances. “Mandatory” refers to the officer’s authority to require the specimen, not an exception to the warrant requirement itself.

Q: Can I still fight my case if my blood was drawn pursuant to a valid-looking warrant?
A: Yes. A warrant that appears valid on its face can still be challenged — through the sufficiency of the underlying affidavit, how the draw was actually performed, and the chain of custody of the sample afterward.

Q: I refused the breath test. Doesn’t that help my case?
A: Refusing a breath test carries its own consequences, including an automatic license suspension, and it doesn’t prevent a blood draw from being obtained through a warrant. Whether refusing was the right call in your specific situation is worth discussing with your attorney, since it depends on your circumstances.

Q: Who is actually allowed to draw my blood after a DWI arrest?
A: Texas law specifies qualified personnel — generally a physician, qualified technician, chemist, or nurse — for a draw done under the general consent framework. When a warrant is involved, this specific list doesn’t strictly control, but the overall reasonableness of how the draw was performed can still be challenged.

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

Division: Criminal Defense San Antonio
Practice Area: DWI & Intoxication