How to Get Your Blood Test Results After a Texas DWI

Being arrested for Driving While Intoxicated (DWI) in Texas is overwhelming, especially when a blood test is part of the investigation. Many people wonder how long it takes to get results, what those results mean for their driver's license, and how they can prepare while waiting. This article explains the process, the differences between types of blood draws, and what you should do while your case is pending.

Medical vs. Evidentiary Blood Draws

When blood is taken at a hospital for medical reasons, those records are part of your health records. You have the right to request them directly from the hospital. These tests are generally used for medical treatment and may not meet the same forensic standards required in a criminal case. In fact, medical blood alcohol concentration (BAC) tests are sometimes less precise because of the methods used, with error margins that can be significant.

By contrast, when law enforcement orders a blood draw as part of a criminal DWI investigation, the blood becomes evidence. That sample is sent to a Department of Public Safety (DPS) crime lab where it must pass through a strict chain of custody. Every person who handles the sample must be documented to ensure that the blood tested is the same blood taken from the driver. These samples are tested using more rigorous forensic methods, such as gas chromatography, which courts generally accept as reliable evidence.

How Long Do DWI Blood Test Results Take?

Texas DPS labs do not provide instant results. Because the same labs process fingerprints, DNA, ballistics, and other forensic evidence, the backlog is significant. On average, blood test results take 8 to 12 weeks before they are available to prosecutors or defense attorneys. In some cases, delays can push results back even further.

You will know the results are complete when you receive a Notice of Suspension letter from DPS. This letter notifies you that DPS intends to suspend your driver's license based on the blood test results.

License Suspension and the ALR Hearing

Once the suspension notice arrives, you have only 20 days to request an Administrative License Revocation (ALR) hearing. If no hearing is requested, the license suspension automatically takes effect—usually after 40 days from the date of the notice.

At an ALR hearing, your attorney can challenge the suspension by examining issues such as whether the blood was drawn legally, whether the lab followed proper procedures, and whether the chain of custody was maintained.

Why Checking the Mail Matters

Many people lose the ability to fight a suspension simply because they don't see the DPS letter in time. Checking your mail regularly is critical. If the deadline to request an ALR hearing passes, DPS will suspend your license automatically, even before the criminal DWI case moves forward.

Common Issues With DWI Blood Evidence

Even when blood test results show a BAC above the legal limit, those results are not the end of the case. Defense attorneys frequently investigate:

• Whether the blood draw was performed correctly under Texas law.

• Lab certification issues (labs must be properly accredited).

• Improper storage, such as past cases where labs stored blood in broken refrigerators, calling results into question.

• Errors in the chain of custody that could make results inadmissible.

These challenges can be crucial in determining whether the evidence is reliable enough to use in court.

Crash Reports vs. Police Reports

Drivers often confuse a crash report with a police offense report. A crash report primarily serves insurance companies and may contain mistakes or contradictory notes from an officer. The police offense report, on the other hand, contains the officer's narrative of suspected intoxication and will play a much larger role in the criminal case. Errors in crash reports typically affect insurance disputes more than the DWI charge itself.

What You Should Do While Waiting

If you are waiting on blood test results after a DWI arrest in Texas, keep these steps in mind:

• Check your mail daily for the DPS suspension notice.

• Act quickly—you have only 20 days to request an ALR hearing.

• Gather documents such as crash reports for work or insurance purposes, but direct any official questions to your attorney.

• Understand you are innocent until proven guilty—blood results are just one piece of evidence, and their accuracy can be challenged.

Final Thoughts

Waiting for DWI blood test results can feel like being in limbo. The timeline is slow, the consequences are serious, and the process is confusing. But knowing what to expect can help you stay ahead of deadlines and protect your rights.

• Blood results usually take 8–12 weeks.

• DPS will send a suspension notice by mail once results are in.

• You have 20 days to fight the suspension through an ALR hearing.

• Even a high BAC result can be challenged based on legal and scientific errors.

If you or someone you know is facing this process, understanding these steps can make the difference between protecting your license and losing it before your case is even heard.