When a DUI investigation involves an injured person, the legal stakes depend heavily on the nature of the injury and the causal connection between intoxication and the crash. A person can face an ordinary DUI with an accident, but when intoxication proximately causes serious bodily injury, Tennessee’s vehicular-assault statute can elevate the case to a Class D felony.
That makes medical proof and crash causation just as important as toxicology. The State must prove more than a positive blood result and an injured person at the scene. Kevin Kennedy reviews DUI-with-injury cases by separating impairment, recklessness, injury severity, and causation into distinct issues.
DUI With Injury Versus Vehicular Assault
Tennessee does not create a separate misdemeanor offense simply called “DUI with injury.” If the injury does not rise to the level required for vehicular assault, the prosecution may still pursue DUI and any other applicable traffic or assault-related charge.
Vehicular assault under § 39-13-106 applies when, as the proximate result of intoxication, a person recklessly causes serious bodily injury to another person through operation of a motor vehicle or qualifying vessel.
Serious Bodily Injury Has a Specific Meaning
Effective July 1, 2026, Tennessee expressly defines serious bodily injury for vehicular assault to include injury involving a substantial risk of death, protracted unconsciousness, extreme physical pain, protracted or obvious disfigurement, protracted loss or substantial impairment of a bodily function, or a broken bone.
That definition makes the medical records crucial. A painful injury may still fall short of the statutory standard, while a fracture may independently satisfy it.
Causation Is Not Automatic
The prosecution must prove that intoxication was the proximate cause of the reckless driving that produced the serious bodily injury. Evidence that the accused had alcohol or drugs in the system does not automatically establish that intoxication caused the collision.
Another driver’s conduct, road conditions, visibility, vehicle defects, pedestrian movement, or other intervening events may affect the causal analysis.
Chemical Testing Can Be Challenged
Blood and breath evidence may be central, especially after a significant crash. The defense should examine how the sample was obtained, whether a warrant was required and valid, whether hospital testing differs from forensic testing, and whether chain-of-custody and laboratory procedures were followed.
Drug-based cases can present additional issues because the presence of a drug or metabolite does not always establish impairment at the time of driving.
The Injury Evidence Should Be Examined Independently
Police reports may describe injuries in general terms, while the actual medical records tell a more precise story. Emergency-room diagnoses, imaging, surgery, follow-up treatment, pain complaints, and the duration of impairment can determine whether the felony element is satisfied.
The defense may also need to examine whether a claimed injury was preexisting or worsened by events unrelated to the collision.
A Broken Bone Now Expressly Qualifies
The 2026 amendment is especially significant because it expressly includes a broken bone in the vehicular-assault serious-bodily-injury definition. For offenses committed on or after the effective date, a fracture can satisfy that element without requiring the State to prove an additional category such as protracted impairment.
The offense date matters. Older conduct may be governed by the law in effect at the time, so the defense should not apply the 2026 definition retroactively without analyzing the applicable statute.
Vehicular Assault Penalties
Vehicular assault is a Class D felony. Tennessee law also imposes mandatory minimum incarceration that increases with qualifying prior alcohol-related convictions.
A first conviction carries a mandatory minimum forty-eight consecutive hours. The minimum rises to forty-five days with one qualifying prior, one hundred twenty days with two, and one hundred fifty days with three or more.
Passenger and Multi-Vehicle Cases
The injured person may be a passenger in the accused’s vehicle, an occupant of another vehicle, a pedestrian, bicyclist, or another road user. Each setting creates different factual questions about seatbelts, positioning, speed, right of way, and causation.
In a multi-vehicle crash, the fact that the accused was impaired does not automatically resolve which driver’s conduct produced the injury.
Statements and Medical Treatment
Injury cases frequently involve questioning at hospitals. A defendant may be medicated or focused on treatment while officers ask about drinking, drug use, or who was driving.
The defense should evaluate voluntariness, Miranda where applicable, and whether medical records accurately distinguish statements made for treatment from statements made to law enforcement.
Accident Reconstruction Can Be Critical
Injury cases often involve more detailed reconstruction than an ordinary DUI. Investigators may analyze skid marks, crush damage, event-data-recorder information, road geometry, surveillance, traffic cameras, and witness accounts.
The defense should determine whether the reconstruction proves reckless operation caused by intoxication or merely identifies the physical point of impact.
How Kevin Kennedy Defends DUI Injury Cases
Kevin reviews toxicology and medical evidence alongside the physical crash evidence. That allows the defense to challenge the State’s theory at several points: intoxication, reckless driving, serious bodily injury, or proximate causation.
His former-prosecutor experience helps him evaluate when prosecutors may be stretching an ordinary DUI crash into a felony vehicular-assault case. If you are charged with DUI involving injury or vehicular assault in Nashville or Middle Tennessee, contact Kevin Kennedy Law Firm for a free, confidential consultation.
Legal references: Tenn. Code Ann. §§ 55-10-401, 55-10-406, 39-13-106, and 40-35-111; 2026 Tenn. Pub. Acts ch. 875. This page is general information, not legal advice.