What is the Best Defense for a DUI?

Facing a DUI (Driving Under the Influence) charge can be a daunting and stressful experience. While the specifics of each case vary, the best defense for a DUI depends on the unique circumstances surrounding your arrest, the evidence against you, and the laws in your state. A strong defense often requires the expertise of a skilled attorney who can tailor their strategy to your case. Below are some of the most effective defenses used in DUI cases.

1. Challenging the Traffic Stop

For a DUI arrest to be valid, the officer must have had reasonable suspicion to pull you over. If there was no valid reason for the traffic stop—such as swerving, speeding, or running a red light—your lawyer can argue that the stop was unlawful. Evidence obtained during an illegal stop, including breathalyzer results and field sobriety tests, may be inadmissible in court.

2. Questioning Field Sobriety Tests

Field sobriety tests (FSTs) are subjective and prone to error. Factors such as uneven road surfaces, poor lighting, bad weather, or medical conditions can affect your ability to perform these tests accurately. A defense lawyer can argue that the results of FSTs are unreliable and should not be used as evidence.

Common Issues:

Improper administration of the tests.
Physical or medical conditions that mimic intoxication (e.g., inner ear issues, injuries, or neurological disorders).
Anxiety or nervousness affecting performance.

3. Challenging Breathalyzer Accuracy

Breathalyzer devices are not foolproof. They must be properly maintained and calibrated to provide accurate results. Your attorney can investigate whether:

The device was correctly calibrated.
The officer was trained to use it.
External factors, such as residual alcohol in your mouth, medical conditions, or even certain foods or medications, affected the results.
If the breathalyzer test was improperly conducted or the device was malfunctioning, the results may be invalidated.

4. Blood Test Errors

If you underwent a blood test, the sample must be handled and analyzed according to strict protocols. Any errors in the chain of custody, improper storage, or contamination can compromise the results. An attorney can inspect the lab records and identify any irregularities that cast doubt on the reliability of the test.

5. Proving Lack of Impairment

A DUI charge requires proof that you were impaired while driving. However, showing signs of impairment does not necessarily mean you were over the legal limit or unable to operate a vehicle safely. Your lawyer can present evidence to counter claims of impairment, such as:

Medical conditions that mimic intoxication (e.g., diabetes, fatigue, or allergies).
Witness testimony supporting your behavior and driving ability.

6. Arguing Rising Blood Alcohol Levels

Your blood alcohol concentration (BAC) may have risen between the time you were pulled over and when your test was conducted. This is especially relevant if you had consumed alcohol shortly before driving, as it takes time for alcohol to be absorbed into the bloodstream. Your lawyer can argue that your BAC was below the legal limit while you were actually driving.

7. Highlighting Violations of Your Rights

Law enforcement must follow specific procedures during a DUI arrest. If your rights were violated, your attorney could argue for a dismissal of the charges. Common violations include:

Failure to read your Miranda rights. This would only apply if you made incriminating statements while being questioned by the officer. Failure to read Miranda rights alone is not a defense to the case.
Conducting a search or administering a test without proper consent, warrant, probable cause, or proper inventory search.

8. Medical or Health Defenses

Certain medical conditions can mimic the signs of intoxication, such as slurred speech, poor coordination, or breath that contains alcohol-like compounds. For example:

Diabetes can cause symptoms like confusion and acetone breath.
Acid reflux or GERD can affect breathalyzer results.
Neurological disorders can impair motor skills.

A strong defense may involve medical records or expert testimony to explain these conditions. Expert testimony can get very expensive costing thousands of dollars.

9. Witness Testimony and Video Evidence

Bodycam footage, along with witness testimony, can provide valuable evidence to support your defense. For instance, video evidence might that the officer improperly administered tests.

10. Negotiating Lesser Charges

In some cases, the best defense may involve negotiating with the prosecutor for a plea deal. This could reduce your DUI charge to a lesser offense, such as reckless driving or a diversion program, which carries fewer penalties and long-term consequences.

Every Case is Unique

There is no one-size-fits-all defense for a DUI. The best strategy depends on the specifics of your case, including the evidence, the circumstances of your arrest, and your personal situation. Consulting with an experienced Shreveport DUI defense attorney is crucial to building a tailored defense that maximizes your chances of a favorable outcome.

DWI Law Firm

The Barkemeyer Law Firm is a group of Louisiana DWI lawyers that practice primarily DUI defense in all areas of Louisiana. We are not spending our time and efforts on personal injury cases or traffic tickets. We focus on DWI defense all day, every day.

If you’re facing a DUI charge, don’t hesitate to contact us. The right defense can make all the difference in protecting your rights, your record, and your future.

Carl Barkemeyer wrote the published book on DWI: Practical Information for the Accused and Attorneys in Louisiana. He regularly gives lectures and advice to other attorneys regarding how to successfully defend clients for DWI.

This article was written by Louisiana DWI attorney Carl Barkemeyer of Barkemeyer Law Firm.