Hablamos Español

(210) 247-4189

Protect Your License

Call Now for a Free Consultation

Should You Take a Blood Test, a Breath Test, or Neither After Being Pulled Over for Suspected DWI or DUI

When you’re pulled over for suspected DWI (Driving While Intoxicated) or DUI (Driving Under the Influence), it can be an incredibly stressful situation. The stakes are high, and the decisions you make in the heat of the moment could have long-lasting consequences. A common question that many people face during this type of encounter is whether they should take a blood test, a breath test, or refuse both.

In this blog, we’ll break down the pros and cons of each test, explain the legal implications, and help you understand your rights when faced with a potential DUI/DWI charge. If you’re in San Antonio, Texas, and need legal advice about your rights or your options, The Law Office of Robert Barrera Arellano is here to guide you through this challenging time.

Understanding DWI and DUI Charges in Texas

Before diving into the specifics of blood and breath tests, it’s essential to understand the basics of DWI and DUI in Texas. A DWI charge generally applies when someone is caught driving under the influence of alcohol or drugs, regardless of age. DUI typically applies to underage drivers with any detectable alcohol in their system. Both charges are serious and carry significant consequences, including fines, license suspension, and even jail time.

Blood Test vs. Breath Test: What's the Difference?

In Texas, law enforcement officers may request either a blood test or a breath test if they suspect you’re driving under the influence. But what exactly is the difference

  • Blood Test: The Most Accurate Option
    A blood test involves drawing blood from your arm and sending it to a lab for analysis. It’s generally considered the most accurate test for detecting alcohol or drugs in your system, as it measures the actual concentration of substances in your bloodstream.

  • Breath Test: Quick and Convenient, but Less Reliable
    A breath test, on the other hand, measures the amount of alcohol in your breath, which is then used to estimate your blood alcohol concentration (BAC). While breath tests are faster and less invasive than blood tests, they are not as accurate and can be influenced by a variety of factors, such as breath temperature, calibration of the device, and even the type of food you’ve recently eaten.

Should You Take the Blood Test or Breath Test?

Deciding whether to submit to a blood or breath test depends on several factors, including your situation, the test’s reliability, and the potential legal consequences.

  • Advantages of a Blood Test
    • Higher accuracy
      Blood tests are generally more reliable for determining BAC and detecting drugs.

    • More difficult to challenge in court
      A blood test result is harder for defense attorneys to contest.

  • Disadvantages of a Blood Test
    • Invasive
      Drawing blood is more invasive than taking a breath test.

    • Takes longer
      Blood tests may take longer for the results to come back.

  • Advantages of a Breath Test
    • Non-invasive
      A breath test doesn’t require a needle or blood draw.

    • Immediate results
      You get the results right on the spot.

  • Disadvantages of a Breath Test
    • Potentially less accurate
      Factors like the type of breathalyzer and how well it is calibrated can lead to inaccurate readings.

    • Can be influenced by external factors
      Things like food, mouthwash, or certain medical conditions can affect the results.

What Happens if You Refuse a Test?

In Texas, you have the right to refuse both a blood and breath test. However, refusing a test comes with consequences. Under Texas’ “Implied Consent Law,” by driving on Texas roads, you’ve already agreed to submit to a test if requested by law enforcement.

  • The Consequences of Refusing a Breath Test
    Refusing a breath test can lead to an automatic license suspension for up to 180 days, even if you’re not convicted of DWI or DUI. Additionally, refusal can be used against you in court as evidence of guilt, potentially making your case harder to defend.

  • The Consequences of Refusing a Blood Test
    Refusing a blood test also carries similar penalties as refusing a breath test. However, keep in mind that refusing a blood test doesn’t necessarily mean you’re off the hook. Officers may still be able to secure a warrant for a blood draw if they believe you are under the influence.

Legal Implications of BAC Results

Your BAC level can have a significant impact on the outcome of your case. In Texas, the legal limit for BAC is 0.08% for most drivers. However, if you’re under 21, any alcohol in your system can result in a DUI charge. Also, the presence of drugs in your system, even in small amounts, can result in a DWI charge.

  • How a High BAC Can Affect Your Case
    If your BAC is over the legal limit, it can strengthen the prosecution’s case against you, but it’s not an automatic conviction. With the help of an experienced DUI lawyer, you may be able to challenge the results or negotiate a plea deal.

     

  • How a Low or Negative BAC Can Affect Your Case
    If your BAC is below the legal limit or there are no traces of alcohol or drugs in your system, you may still face a DWI charge if the officer believes you were impaired by other substances. A good attorney can challenge this and provide a strong defense.

Should You Consult an Attorney Before Taking a Test?

If you’re pulled over and asked to take a test, it’s wise to consider consulting with an attorney before making a decision. While you may not have the time to make a phone call before taking the test, knowing your rights ahead of time can help you make a more informed decision.

Being pulled over for a suspected DWI or DUI can be a frightening experience, but knowing your rights and the consequences of taking or refusing a test can make all the difference. Whether you opt for a blood test or a breath test, or decide to refuse both, it’s important to understand the potential legal outcomes of your actions. If you’re in San Antonio and facing DWI/DUI charges, don’t navigate this difficult time alone. Contact The Law Office of Robert Barrera Arellano to get the experienced legal representation you need.

we protect your rights

If you’re facing DWI or DUI charges, Attorney Robert Barrera Arellano is here to protect your rights. With extensive experience handling DWI/DUI cases in San Antonio, Robert Barrera Arellano will guide you through the complexities of the legal process, whether you took a breath or blood test, or refused both.

REACH OUT

FAQs

It’s important to know that taking a breath test is not mandatory, but refusing it can lead to automatic penalties like license suspension.

Yes, a breathalyzer test result can be challenged, especially if the device was not properly calibrated or if there were other influencing factors.

Refusing both tests can result in an automatic license suspension and can be used against you in court.

Blood test results can take a few days to come back, as they need to be sent to a lab for analysis.

Yes, you can still be charged with DWI if an officer believes you’re impaired by drugs or alcohol, even if your BAC is under 0.08%.

Skip to content