Can A DWI Be Dismissed If Police Had No Reason To Stop Me?
A police officer cannot lawfully stop your vehicle simply because it is late at night, you are leaving an area where alcohol is served, or the officer has a feeling that you may have been drinking. A traffic stop is a seizure under the Fourth Amendment, and law enforcement generally must have an objective legal basis for making that stop.
When we defend a DWI case in Galveston County, one of the first questions we examine is why the officer stopped the vehicle in the first place. That issue can be just as important as the breath test, blood test, field sobriety tests, or statements made after the stop. If the initial detention violated your constitutional rights, we may be able to ask the court to suppress evidence obtained as a result, and losing that evidence can sometimes leave prosecutors unable to prove the DWI charge.
Police Generally Need Reasonable Suspicion To Stop Your Vehicle
Texas courts apply Fourth Amendment principles when deciding whether a traffic stop was lawful. An officer generally needs specific, articulable facts that objectively support reasonable suspicion that a crime or traffic violation has occurred, is occurring, or is about to occur. A mere hunch is not enough. Texas courts evaluate the totality of the circumstances rather than relying solely on what an officer says he or she believed at the time.
This distinction matters in DWI cases because many arrests begin with relatively minor driving observations. An officer may claim that a driver was weaving, drifting within a lane, driving unusually slowly, failing to signal, speeding, or committing another traffic violation. Our job is to determine exactly what happened and whether the officer’s observations actually supplied a lawful basis for the detention.
We do not simply accept the police report as the final word. Dash camera footage, body camera video, roadway conditions, traffic markings, dispatch records, witness statements, and the officer’s testimony can all affect whether reasonable suspicion existed.
A Traffic Violation Can Provide A Legal Basis For The Stop
An officer does not necessarily need to suspect DWI before stopping a vehicle. If the officer reasonably suspects that a traffic violation occurred, that violation may provide a lawful basis for the stop even if the investigation later turns into a DWI investigation.
Texas courts have recognized that an objectively justified traffic violation may support a vehicle stop. Courts look at whether the facts known to the officer at the time provided an objectively reasonable basis for the detention.
For example, an officer may stop a driver for speeding and then claim to smell alcohol during the encounter. That may lead to questions about drinking, field sobriety testing, and eventually an arrest. In that situation, we would examine both the original reason for the stop and whether the officer lawfully expanded the investigation after making contact with the driver.
The fact that a person is eventually arrested for DWI does not retroactively make the original stop lawful. The State must be able to justify the seizure based on information available when the stop occurred.
Weaving Does Not Automatically Make Every Stop Legal
Weaving allegations appear frequently in DWI cases, particularly during nighttime traffic stops. Whether weaving creates reasonable suspicion depends heavily on the specific facts.
An officer may describe a vehicle as drifting, weaving, touching a lane marker, or moving within its own lane. We want to know how often this occurred, how far the vehicle moved, whether another vehicle was endangered, what the road looked like, whether construction was present, and whether the video actually supports the officer’s description.
Courts determine reasonable suspicion from the totality of the circumstances. Conduct does not necessarily have to establish that an offense definitely occurred, but the officer must be able to identify objective facts supporting a reasonable suspicion rather than relying on an unsupported impression.
That is why video evidence can be so important. Sometimes the police report sounds far more serious than the driving shown on the dash camera.
Being Out Late At Night Is Not Enough By Itself
Many DWI arrests occur late at night, particularly around weekends, holidays, entertainment districts, restaurants, bars, and special events. Time and location can be part of the circumstances an officer considers, but those facts do not automatically establish reasonable suspicion.
Simply driving late at night does not mean you are intoxicated. Leaving a restaurant or entertainment district does not establish that you consumed alcohol. Even leaving a bar does not necessarily establish that you were drinking, much less that you were intoxicated while operating a motor vehicle.
The officer still needs objective facts supporting the detention. Texas courts require something more than an unparticularized suspicion or hunch before a person may be detained for investigation.
When the stated justification appears weak, we examine the entire sequence leading to the stop rather than starting our analysis with what happened afterward.
What Happens If The Traffic Stop Was Illegal?
An unlawful traffic stop can have major consequences for the prosecution’s case because much of the evidence in a DWI prosecution is collected only after the driver has been detained.
Texas Code of Criminal Procedure Article 38.23 generally prohibits evidence obtained in violation of the United States Constitution, the Texas Constitution, or applicable law from being admitted against an accused in a criminal case.
That can matter greatly in a DWI prosecution. The odor of alcohol, statements about drinking, field sobriety test results, observations of balance or speech, breath test evidence, and some blood evidence may all arise after the vehicle was stopped.
If we establish that the initial stop was unlawful and the court determines that particular evidence resulted from that unlawful detention, we can seek suppression of that evidence. Suppression can dramatically alter what the prosecution is able to present at trial.
Suppression And Dismissal Are Not Exactly The Same Thing
It is important to understand the difference between suppressing evidence and dismissing a DWI charge.
A judge does not necessarily dismiss the entire case simply because a defense lawyer challenges the traffic stop. Instead, we ordinarily file a motion asking the court to suppress evidence that resulted from an unconstitutional stop or detention. The judge then considers evidence and legal arguments concerning the officer’s justification for the stop.
If the court suppresses critical evidence, prosecutors must decide whether they still have enough admissible evidence to prove DWI beyond a reasonable doubt. In some cases, suppression removes so much of the prosecution’s evidence that dismissal becomes the practical result. In other situations, prosecutors may still possess independent evidence that allows the case to continue.
We therefore never tell a client that an unlawful stop automatically guarantees dismissal. We examine what evidence could be excluded and what evidence, if any, would remain.
Texas Law Still Requires The State To Prove DWI
Even when the traffic stop itself survives a constitutional challenge, prosecutors still must prove the DWI charge.
Under Texas Penal Code § 49.04, a person commits DWI when the person is intoxicated while operating a motor vehicle in a public place. Intoxication generally involves either not having the normal use of mental or physical faculties because of alcohol, drugs, another substance, or a combination of substances, or having an alcohol concentration of at least 0.08.
A valid stop therefore does not mean the State has proved intoxication. Likewise, an officer’s suspicion that someone may have consumed alcohol is different from proof that the person was legally intoxicated.
We examine each stage independently. Was there a lawful stop? Was the detention lawfully extended? Was there probable cause for the arrest? Were field sobriety tests administered properly? Was breath or blood evidence collected and handled lawfully? Each question can affect the strength of the prosecution’s case.
An Anonymous Tip Can Raise Additional Legal Questions
Some DWI investigations begin after another driver, business employee, security worker, or anonymous caller reports suspected drunk driving.
Police can sometimes rely on information supplied by another person, but the reliability and detail of that information matter. Texas courts have recognized that reasonable suspicion can be based on information provided by someone other than the officer when the circumstances provide sufficient reliability.
We examine what the caller actually reported, whether the caller identified himself or herself, whether police confirmed significant details, what conduct the officer personally observed, and how much time passed before the vehicle was stopped.
A vague report that someone “might be drunk” presents different constitutional questions from a detailed report describing dangerous driving, the vehicle, its location, and conduct witnessed firsthand.
The Officer’s Dash Camera Can Become Critical Evidence
One of the most useful pieces of evidence in a disputed traffic stop can be the officer’s own video.
Suppose an officer writes that your vehicle repeatedly crossed lane markings, nearly hit another car, and was driving erratically. If the dash camera instead shows relatively normal driving, that difference matters. The video can also establish where the officer first observed the vehicle, how long the officer followed it, road and weather conditions, and whether the alleged traffic violation actually occurred.
Body camera footage may become important after the stop as well. It can show what the officer said the reason for the stop was, whether the officer changed that explanation later, how you spoke and moved, and how the investigation progressed.
We compare the written report, sworn testimony, video, and other evidence instead of treating any one source as unquestionable.
A Motion To Suppress Can Be A Major Part Of The Defense
When the facts support it, we may file a motion to suppress asking the trial court to exclude evidence obtained through an unlawful stop or detention.
A suppression hearing gives the defense an opportunity to test the officer’s claimed justification in court. The officer may have to explain exactly what was observed and why those facts justified stopping the vehicle. The court then applies constitutional standards to those facts.
Texas appellate courts give substantial deference to trial courts on historical facts and credibility determinations while reviewing the application of search-and-seizure law under established standards.
This is why preparation matters. Small factual details may determine whether the stop survives constitutional review.
The DWI Case And Driver’s License Case Are Different
A DWI arrest can also trigger administrative driver’s license consequences that are separate from the criminal prosecution.
Texas Transportation Code Chapters 524 and 724 address administrative license suspensions associated with certain DWI arrests, testing results, and refusals. The deadlines and legal issues involved in an administrative license case are not always identical to those in the criminal DWI prosecution.
A favorable ruling in one proceeding should therefore not be assumed to resolve every issue in the other. When we review a DWI arrest, we consider both the criminal charge and the driver’s license consequences that may follow from it.
Why We Examine The Stop Immediately
The legality of the stop is one of the first issues we investigate because evidence can become harder to obtain as time passes.
Video may need to be preserved. Dispatch information may reveal why an officer began following the vehicle. Witnesses may remember roadway conditions or the driver’s conduct. Records can establish whether the officer’s stated explanation is consistent with what was reported at the time.
A DWI case should not be viewed simply as a question of whether a breath or blood number was above 0.08. If police violated constitutional protections before gathering that evidence, the legality of how the evidence was obtained may become central to the defense.
Speak With Mark Diaz & Associates About A Galveston DWI Arrest
If you were arrested for DWI after a traffic stop that did not seem justified, the reason for that stop deserves careful investigation. We do not assume that the officer had reasonable suspicion simply because an arrest followed. We examine what the officer observed, what the police report claims occurred, what the video actually shows, and whether the State can establish a lawful basis for the detention. When the evidence supports a constitutional challenge, we can seek suppression of evidence and pursue dismissal or another favorable resolution when legally available.
At Mark Diaz & Associates, we represent people charged with DWI and other criminal offenses in Galveston and throughout Houston, Texas. We understand that a DWI prosecution can affect your license, employment, finances, reputation, and freedom, and we approach the case with those consequences in mind.
When you hire me, you work directly with me. My clients have my personal cell phone number because questions, emergencies, and concerns don’t always happen during business hours. You won’t be handed off to a junior associate or lost in a system where your case is one of dozens on a crowded docket. From arrest through resolution, I remain personally involved and accessible.
If you have been arrested for DWI in Galveston or anywhere in Houston, contact our Galveston DWI defense lawyers at Mark Diaz & Associates by calling 409-515-6170 to receive your free consultation. We can review the circumstances surrounding your traffic stop, the evidence gathered afterward, and the defenses that may be available under Texas law.
