San Marcos, TX asked in DUI / DWI and Constitutional Law for Texas

Q: Can an officer force me to take a blood test during a Texas DWI stop without a warrant?

During a DWI stop in Texas, I was informed of my rights and did not refuse any tests, even offering to take a breathalyzer. However, the officer insisted on a blood test without showing a warrant or explaining why a blood test was necessary. He stated that he didn't need to show me a warrant. Can an officer legally require a blood test under these circumstances without presenting a warrant?

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3 Lawyer Answers

A: NO!

The only way that officer is correct is if you had a car wreck and someone was hurt.

Even then, he needs a warrant.

If they took your blood and are prosecuting you for DUI, you must object and have your attorney know what you have asked here.

If it was my case, I would make a motion to suppress and quash the evidence from the blood test.

There are some funky rules that apply in small counties. If you are in a county with only one District Court judge and very few lower level judges, there are some exceptions to the above rule. Be sure you talk to a lawyer who has experience in DUI matters.

Good Luck!

A: The officer cannot legally require a blood test under the circumstances without a warrant.

He can ask you for a blood sample. The State can suspend your drivers' license under our implied consent law if you refuse. But the officer cannot legally take a blood sample from you without your consent unless you are unconscious and were involved in a collision without a warrant.

James L. Arrasmith
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Answered

A: When you are pulled over for DWI in Texas, the state’s implied consent laws mean that by driving, you agree to chemical testing if suspected of impaired driving. However, a blood test is seen as more invasive than a breathalyzer, and the law generally requires that either you consent to it or that the officer demonstrate exigent circumstances.

If you did not give explicit consent for a blood draw, the officer typically must obtain a warrant unless an emergency situation exists that would justify a warrantless test. In your case, if you voluntarily agreed to any testing but only offered a breathalyzer, the insistence on a blood test without clear justification could be legally contestable.

It would be advisable for you to discuss the specifics of your situation with a legal professional who can help determine if your rights were violated.

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