Facing a DUI charge involving a commercial vehicle in Tennessee can be daunting. The penalties are serious and can have a lasting impact on your livelihood. However, there are several legal defenses that could work in your favor. Understanding your rights and the available defenses is crucial when dealing with such a case.
What You Need to Know About Commercial DUI Charges in Tennessee
A commercial DUI charge in Tennessee involves operating a commercial vehicle, like a truck or bus, while under the influence of alcohol or drugs. The blood alcohol concentration (BAC) limit for commercial drivers is stricter than for regular drivers. While the BAC limit for standard drivers is 0.08 percent, commercial drivers are considered impaired with a BAC of 0.04 percent or higher. The penalties for a commercial DUI charge can be severe. Drivers may face hefty fines, suspension of their commercial driver’s license, and potential jail time. It is important to know how to defend against these charges.
Improper Stop of the Vehicle
One of the most effective defenses in a commercial DUI case is that the vehicle was stopped without proper cause. Law enforcement must have a valid reason to pull over a commercial driver. If the officer did not have probable cause for the stop, any evidence obtained during that stop may be thrown out.
For example, an officer may claim they stopped the vehicle because it was swerving, but if the stop was based on a vague suspicion, it may be considered unlawful. Your attorney could argue that the stop was not legally justified, leading to a dismissal of the charges.
Inaccurate Breathalyzer Results
Breathalyzer tests are often used to determine a person’s BAC. However, these tests are not always accurate. Several factors can contribute to incorrect readings, such as improper calibration of the machine, incorrect handling by the officer, or even medical conditions that can skew the results. If a breathalyzer test was used, it is essential to investigate whether the machine was calibrated properly and if the officer followed the correct procedures. If the results are deemed unreliable, your defense may challenge the accuracy of the evidence.
Improper Handling of Blood or Urine Samples
Blood or urine tests may also be used to determine intoxication. However, these samples must be properly handled to ensure the integrity of the results. If the samples were improperly collected, stored, or tested, the results may be questionable. For example, if the blood sample was not sealed properly or was delayed in being tested, the evidence may not be reliable. An attorney can look into how the sample was handled and challenge the validity of the test results if any errors were made.
Medical Conditions That Mimic DUI Symptoms
Certain medical conditions can cause symptoms that resemble intoxication, such as slurred speech or poor coordination. Conditions like diabetes, hypoglycemia, or neurological disorders can result in behaviors that may be misinterpreted as impairment.
If you have a medical condition that contributed to the symptoms observed during the stop, your attorney could bring in medical professionals to explain how the condition affected your behavior, showing that it was not due to alcohol or drugs.
Faulty Field Sobriety Tests
Field sobriety tests are another method officers use to assess impairment. These tests, such as walking in a straight line or standing on one leg, are not always accurate. Factors like fatigue, weather conditions, or physical limitations can affect your performance. For instance, if the test was conducted in a poorly lit area or if you struggled with certain movements due to physical injuries, your attorney could argue that the results of the sobriety test were not reliable.
Lack of Evidence of Impairment
In some cases, there may be insufficient evidence to prove that you were impaired. If there is no video footage, no clear signs of intoxication, or unreliable test results, your attorney could argue that there is not enough evidence to support the DUI charge.
Without strong evidence, the prosecution may not be able to prove their case. Your defense attorney can highlight the lack of clear evidence, which may lead to the case being dropped.
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Unlawful Search and Seizure
Law enforcement officers are required to follow the Fourth Amendment, which protects against unreasonable searches and seizures. If the officer violated this during the stop, such as searching your vehicle without a valid reason, any evidence they collected could be excluded from court. For example, if the officer searched your vehicle without consent or a warrant, the evidence found could be considered inadmissible, weakening the prosecution’s case.
Failure to Follow Proper Procedures by Law Enforcement
Officers must follow certain procedures during DUI stops, testing, and evidence collection. If they fail to follow these procedures, the evidence they gather may be thrown out. For example, if the officer failed to inform you of your rights or didn’t properly document the stop, your attorney can argue that the case should be dismissed or that the evidence is not valid. A careful review of how the stop and tests were handled could uncover crucial mistakes.
What Should You Do If You Are Facing a Commercial DUI Case?
If you are facing a commercial DUI charge, it is important to understand the defenses that may apply to your case. Whether it’s an improper stop, inaccurate test results, or other factors that work in your favor, a solid defense strategy is key to protecting your rights.
DUI charges carry serious consequences, especially for commercial drivers. But these charges are not always clear-cut, and many defenses can be raised to challenge them. With the right legal help, you can improve your chances of achieving the best possible outcome.
Contact Best & Brock for Legal Assistance
If you are facing a commercial DUI charge, the attorneys at Best & Brock can help guide you through the process. We have the experience to investigate your case and determine the best legal strategy. Get in touch with us today to schedule a consultation. We will fight to protect your rights, your CDL, and your future.







