Hundreds of Tennessee DUI Arrests Involved Drivers Who Tested Negative for Alcohol and Drugs
In 2024, 419 people arrested for DUI in Tennessee later had blood tests showing no detectable alcohol or drugs, according to Tennessee Bureau of Investigation data reported by WSMV4 Investigates. The findings have raised questions about how officers evaluate impairment and what happens when laboratory results do not support the initial suspicion.
For someone arrested after insisting they were sober, a negative toxicology report can be important evidence. But a negative test does not automatically establish that an arrest was unlawful or require prosecutors to dismiss a DUI charge. Understanding that distinction is essential when evaluating these cases.
What Did the Tennessee DUI Arrest Data Show?
The 2024 data identified 419 DUI arrests involving blood samples in which no alcohol or drugs were detected. The Tennessee Highway Patrol accounted for 180 of those arrests, including 41 in its Knoxville district and 37 in its Nashville district.
Other Middle Tennessee agencies appeared in the report, including the Sumner County Sheriff's Office, La Vergne Police Department, and Clarksville Police Department.
The figures became public following investigations by WSMV4 and legislative efforts to improve reporting. In January 2026, the TBI also corrected earlier figures, revealing 2,547 such cases from 2017 through 2024, substantially more than previously reported.
These numbers describe arrests followed by negative laboratory findings. They should not be interpreted as a judicial determination that every arrest was wrongful.
Sources: WSMV4's 2024 arrest findings and its report on the revised historical figures.
Why Can Someone Be Arrested for DUI Without Alcohol or Drugs Being Detected?
Officers often make DUI arrest decisions before laboratory results are available. They may rely on driving behavior, observations during a traffic stop, roadside exercises, statements, and other circumstances.
Some observations associated with impairment can also have other explanations. Fatigue, anxiety, physical limitations, medical emergencies, or unfamiliarity with field sobriety exercises may affect how someone appears during an investigation.
Laboratory testing can help clarify what was present in a person's system, but toxicology testing has limitations. A negative report should be evaluated alongside the substances tested for, the collection procedures, the timing of the sample, and the remaining evidence.
Does a Negative Blood Test Mean a DUI Charge Must Be Dismissed?
No. Tennessee Code § 55-10-401 permits prosecution for driving while impaired by alcohol, drugs, or other covered substances, as well as DUI charges based on specified alcohol concentrations.
A negative blood test may significantly weaken an allegation involving alcohol or drugs, especially when the officer's observations are disputed. However, prosecutors and courts must evaluate the full evidentiary record.
Someone facing this situation should review both the laboratory report and the police evidence before drawing conclusions about the likely outcome. For a separate explanation of the legal issue, see our article on whether you can be charged with DUI after testing negative.
What Evidence Matters When a Driver Says They Were Sober?
The strongest defense often comes from comparing the officer's account with independent evidence.
Dashcam and Bodycam Recordings
Video can show how a vehicle was driven, what occurred during the stop, how roadside exercises were administered, and whether the driver's behavior matches the written report.
Laboratory and Medical Records
Blood test results may help establish whether alcohol or particular drugs were detected. Relevant medical records can also help explain physical symptoms or behavior that an officer interpreted as impairment.
The Basis for the Traffic Stop and Arrest
An attorney may examine whether the officer had a lawful reason to stop the vehicle and sufficient grounds for the arrest. Those are separate legal questions, and a negative blood test alone does not resolve either one.
Herbert & Lux has represented clients in DUI cases where careful examination of testing evidence and police conduct affected the outcome. In one Sumner County case, a first DUI charge was reduced to reckless driving with no probation after blood testing showed no alcohol and the case involved prescribed medication. That result depended on the specific evidence and does not guarantee a similar outcome.
What Should You Do if You Were Arrested for DUI but Were Sober?
Preserve your citation, bond documents, court notices, and any paperwork related to chemical testing. Write down what you remember about the stop, including statements made by the officer and any physical or medical circumstances that may have affected roadside testing.
An attorney can request and evaluate police recordings, laboratory findings, and other relevant records. Do not assume that a negative test will automatically end the case or that you can disregard a scheduled court appearance.
What the Tennessee Findings Mean for Drivers
The TBI figures have increased scrutiny of DUI enforcement and prompted questions about training, investigative practices, and accountability. They also illustrate why the evidence in an individual case matters more than the arresting officer's initial conclusion.
Herbert & Lux represents people facing DUI charges in Nashville and throughout Middle Tennessee. Eddie Herbert's former public defender experience and Ron Lux's law enforcement background inform the firm's approach to examining police evidence and defending criminal allegations.
If you believe you were arrested for DUI despite being sober, learn more about our Nashville DUI defense practice or contact Herbert & Lux to discuss your case.
