Quick answer: San Antonio effectively runs no-refusal year-round: refuse a breath test after a DWI arrest and officers obtain a blood-draw warrant from an on-call magistrate — usually within the hour. Refusal still triggers the 180-day license suspension, but it rarely keeps a BAC number out of the case.
Bexar County was an early adopter of the always-on no-refusal model, and the infrastructure is mature: template warrant affidavits, on-call magistrates, and nurses stationed for draws. Practically, assume a refusal ends in a warrant and a needle.
That maturity is also the weakness: high-volume, middle-of-the-night warrant practice produces boilerplate affidavits with recycled language and thin case-specific facts — exactly what suppression motions target. Add draw-procedure, storage, and lab-records challenges and blood cases in Bexar County are far more litigable than their reputation. The warrant packet is the first thing we pull.
Related questions
Should I refuse the breath test in San Antonio?
Refusal has a fixed cost (180-day ALR suspension) and an uncertain benefit here, since a blood warrant usually follows. Either way — refused or not — your case remains defensible; the evidence path just changes.
Can a blood warrant be challenged?
Yes: affidavit sufficiency, the magistrate process, draw qualifications, storage and chain of custody, and lab analysis are all attack points. Volume warrant practice makes errors routine.
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General legal information for Texas, not legal advice about your specific case. Last reviewed July 2026.
