San Antonio DWI Defense Attorney

About Blood & Chemical Tests

After a person is stopped by a police officer on suspicion of driving while intoxicated, they will be asked to complete a field sobriety test. This test can range from a walk and turn test (in which the driver will be asked to take several steps forward in a straight line, turn around and follow the same path back) to the horizontal gaze nystagmus test (in which an officer will move a pen or their finger across a suspected drunk driver's eyes to see if the eyes have a slight spasm as they reach the corner). Upon completion of these tests, an officer may ask a driver to blow into a mobile breath test machine.

If the officer is convinced that the driver is under the influence of alcohol or drugs, they will then place the individual under arrest and take him or her back to the station. At the station, the driver will then be asked to take a chemical test, such as a urine or blood test. At this time, if the driver refuses, he or she may face serious consequences. Many police officers take this refusal as a sign of guilt of intoxication, and will push for maximum penalties, while there are many logical reasons that a person would refuse this time of test. Regardless, the state of Texas has an "implied consent" law, meaning that a person gives their consent to a breath or blood test at the time of receiving their driver's license.

Contact a San Antonio DWI Lawyer About Your Chemical Test

If you have been arrested for driving while intoxicated after failing or refusing a chemical test, you will need to immediately speak to a San Antonio DWI defense lawyer. Police officers are expected to follow protocol very closely when taking chemical tests, and only certified individuals may administer the test. We can look into your case to determine if a break in the chain of custody of your test or an accidental mix-up led to the wrong test results. Despite the reason for the DWI arrest, our law firm is ready to help defend your rights and your future.

Contact a San Antonio DWI attorney today!