Can Police Arrest You for DWI Without a Breathalyzer Test?

 Posted on November 05, 2026 in DWI & DUI

Texas police can arrest you for driving while intoxicated (DWI) without a breathalyzer test. Officers need probable cause to make an arrest, not a specific blood alcohol reading. They can rely on driving behavior, roadside tests, and other observations. A conviction is possible without chemical results, but prosecutors must prove guilt beyond a reasonable doubt.

If you face a DWI charge in 2026, our Hays County DWI defense lawyer can examine what supported the arrest and whether the evidence holds up.

What Must Prosecutors Prove in a Texas DWI Case Without a Breath Test?

Under Texas Penal Code § 49.04, a person commits DWI by operating a motor vehicle in a public place while intoxicated. Section 49.01 defines intoxication in two ways. One is having an alcohol concentration of 0.08 or more. The other is losing the normal use of mental or physical abilities because of alcohol, drugs, or another substance.

The second definition does not require a breath or blood test. Prosecutors can use testimony about driving, speech, balance, and behavior, along with video or witness accounts. None of those observations alone guarantees a conviction. The State must prove intoxication while the person was operating the vehicle.

What Gives Texas Police Probable Cause to Arrest Someone for DWI?

Probable cause means the facts give an officer a reasonable basis to believe you drove while intoxicated. Police need less evidence to make an arrest than prosecutors need to win a conviction. An officer might describe swerving, a wide turn, an odor of alcohol, slurred speech, bloodshot eyes, or trouble following directions. Officers also use roadside field sobriety tests to look for signs of impairment.

The stop and arrest have different legal requirements. An officer ordinarily needs reasonable suspicion of a violation to stop a moving vehicle. After investigating, the officer needs probable cause to arrest. A lawyer can challenge either decision. Drinking alcohol alone does not prove someone drove while intoxicated.

What Happens if You Refuse a Breath or Blood Test After a Texas DWI Arrest?

Refusing a breath or blood test does not stop police from arresting you. Police can ask a judge for a warrant to take a blood sample. In some emergencies, police can take a blood sample without a warrant.

Under Texas Transportation Code § 724.035, a refusal can lead to a 180-day driver's license suspension. The suspension increases to two years if your driving record shows a qualifying license penalty in the 10 years before your arrest. For example, a previous license suspension for refusing a test can count. The refusal can also be introduced as evidence at trial.

The license suspension is a separate administrative matter. A dismissed criminal charge does not automatically resolve the license issue.

What Evidence Can Help Challenge a Texas DWI Case Without a Breath Test?

When there is no chemical result, the accuracy of the officer's observations becomes especially important. A lawyer can examine:

• Dashcam and body camera footage showing driving and behavior

• The reason for the traffic stop and arrest

• How field sobriety tests were explained and performed

• Road conditions, lighting, weather, and footwear

• Medical conditions or injuries that affected movement or speech

• Witness statements and records that establish a timeline

Video can show whether the written report matches what actually happened. Poor lighting, uneven pavement, or unclear instructions can affect roadside test performance. However, a test mistake does not automatically require dismissal.

If police stopped or arrested you illegally, your lawyer can ask the judge to keep evidence from that stop or arrest out of your trial. Whether evidence is excluded depends on the facts and applicable law. The defense can challenge an officer's conclusions at trial.

What Should You Do After a DWI Arrest Without a Breath Test in Hays County?

Save every document from the arrest and contact a lawyer promptly. Ask about preserving body camera and dashcam recordings. Write down what you remember about the stop, including testing instructions, road conditions, and anything you told the officer about injuries or medical issues.

Act quickly to protect your driver's license. You can ask for a hearing to challenge the suspension. Texas DPS must receive your request within 15 days after you receive the suspension notice. Missing that deadline can leave the suspension uncontested. The license hearing is separate from criminal court.

Schedule a Free Consultation With Our Decatur, TX DWI Defense Attorney

Attorney Timothy Godwin is a former Texas DPS state trooper and a U.S. Army veteran. His law enforcement experience helps him review roadside testing, police reports, and video evidence from a defense perspective.

If you were arrested for DWI in 2026, legal help can protect your rights and address both the criminal charge and license suspension. Contact Godwin Law Firm, PLLC at 940-255-0000 to speak with a Hays County DWI defense lawyer today.