A West Palm Beach woman now faces a manslaughter charge in connection with a seven-vehicle crash that killed a 72-year-old man on Military Trail. The criminal case raises a broader question for every Florida driver: when someone knows a medical condition could cause a sudden loss of consciousness or control behind the wheel, what responsibility do they have before choosing to drive?
According to the Palm Beach County Sheriff’s Office, investigators concluded that Elizabeth Marie Romero Diaz, 46, knew she had a seizure condition and understood the risk of having another episode while driving before the July 15, 2025 crash that killed Luis Alfonso Vanegas Velez, 72. PBSO arrested Diaz on September 16, 2026, on a charge of manslaughter by culpable negligence.
The case is still pending, and a criminal charge is not a conviction. But the allegations provide an important reminder that a medical episode does not automatically eliminate civil responsibility when the driver knew or reasonably should have known of a condition that could make driving dangerous.
The Seven-Vehicle Crash on Military Trail
The crash occurred on South Military Trail near Westgate Avenue in unincorporated Palm Beach County. According to investigators, Diaz failed to take evasive action as she approached six vehicles stopped at a red light, causing a chain-reaction crash involving seven vehicles.
Vanegas Velez died as a result of the collision. Other people were also involved in the multi-vehicle crash, a fact that can create multiple injury claims, multiple insurance policies, and competing accounts of how the chain reaction unfolded.
PBSO’s investigation focused not merely on whether Diaz had a medical event that day, but on what she knew before she got behind the wheel.
Investigators reported that Diaz had experienced an earlier crash that was attributed to a medical episode. She allegedly told authorities after that earlier crash that she had suffered a seizure and had not taken prescribed seizure medication because she had not picked it up.
PBSO also reported that Diaz was prescribed anti-seizure medication days before the earlier crash. In a sworn interview following the July 2025 collision, investigators said she acknowledged having experienced a seizure while driving before. She also reportedly told investigators that she had asked a family member to ride with her the morning of the crash because she was concerned she might have an “attack” or seizure while driving.
Based on those statements and the larger investigation, deputies concluded that Diaz knew about her seizure condition, knew it could recur while driving, and chose to drive despite that known risk.
A Medical Diagnosis Does Not Automatically Mean Negligence
It is important to be precise. People with epilepsy, seizure disorders, diabetes, cardiac conditions, neurological disorders, and other medical diagnoses are not automatically negligent simply because they drive or experience a health event.
Florida law allows many people with seizure conditions to obtain or retain driving privileges when they satisfy medical and safety requirements. Under Florida’s administrative rules, a person with seizures generally must be seizure-free for two years before a license may be issued or reinstated, although the Medical Advisory Board may reconsider a driver after six months if the driver is under regular medical supervision and seizure-free.
The relevant legal question is not whether someone has a medical diagnosis. The issue is whether that person had enough warning, knowledge, or medical advice to recognize that driving presented an unreasonable and foreseeable risk to others.
For example, civil liability may become a serious issue when evidence shows that a driver:
- Had recent seizures, blackouts, fainting episodes, or loss-of-consciousness events.
- Was advised by a physician not to drive or to limit driving.
- Failed to take prescribed medication intended to control a condition.
- Had a prior crash or near-miss caused by the same condition.
- Had reported fear that another episode could occur while driving.
- Continued to drive despite knowing the condition was uncontrolled or worsening.
The allegations in the Military Trail case concern that last category: a driver who allegedly knew of a substantial risk and drove anyway.
Criminal Charges and Civil Claims Are Different
A criminal manslaughter case and a civil wrongful-death claim serve different purposes. The criminal case is brought by the State of Florida. Prosecutors must prove the charge beyond a reasonable doubt, the highest burden of proof in the legal system. Diaz is presumed innocent unless and until proven guilty in court.
A civil wrongful-death claim is brought by the personal representative of the deceased person’s estate for the benefit of eligible survivors and the estate. Under Florida’s Wrongful Death Act, when a person’s death is caused by another party’s wrongful act, negligence, default, or breach of duty, the responsible party may be liable for damages.
The burden of proof in a civil case is different. The family generally must show, by a preponderance of the evidence, that the defendant’s negligence more likely than not caused the death or injury.
That means a civil case may proceed independently of the criminal matter. A criminal conviction can be important evidence, but it is not the only path to civil accountability. Likewise, an acquittal does not automatically prevent a family from pursuing a civil negligence or wrongful-death claim.
What a Wrongful-Death Investigation Would Examine
In a case involving a known medical condition, the investigation often reaches beyond the crash scene. The core question becomes whether the driver had notice that operating a vehicle could endanger others.
A careful civil investigation may seek evidence involving:
- Prior crashes, citations, or police reports tied to a medical episode.
- Driver statements to law enforcement, family members, employers, or medical providers.
- Medical records, subject to applicable legal procedures and privacy protections.
- Prescriptions, refill history, and medication compliance evidence.
- Physician advice or driving restrictions.
- Florida Highway Safety and Motor Vehicles medical-review records, when available.
- Cellphone data, vehicle event-data recorder information, and dash-camera footage.
- Witness statements from other drivers, passengers, and first responders.
- Traffic-light timing, crash reconstruction, braking evidence, and roadway video.
Florida’s Medical Advisory Board process allows the Florida Department of Highway Safety and Motor Vehicles to request medical information when evaluating a driver’s fitness to operate a vehicle. FLHSMV must make its decision within 90 days after receiving all requested medical information.
In a seven-vehicle crash, the evidence must also establish the sequence of impacts, each vehicle’s speed and position, and whether any other driver’s conduct contributed to the resulting injuries.
The Challenges of a Multi-Vehicle Crash
Chain-reaction crashes can be legally complex because each person may have a different claim and a different degree of injury. One driver may have been stopped at the red light. Another may have been pushed into a third vehicle. A passenger may have suffered serious injuries despite having no control over either vehicle. The family of a person killed in the crash may have a wrongful-death claim, while other injured motorists may have claims for medical expenses, lost wages, vehicle damage, pain and suffering, and future care.
The available insurance coverage may also be complicated. A serious multi-vehicle crash can involve:
- The at-fault driver’s bodily-injury liability policy.
- Uninsured or underinsured motorist coverage available to injured victims.
- Coverage under policies held by vehicle owners, employers, or household members.
- Potential umbrella coverage.
- Multiple claims competing for limited liability-policy limits.
When multiple people are harmed in the same collision, early legal action can be essential to identify coverage, preserve evidence, and protect a victim’s place in the claims process.
Preventing Medical-Event Crashes
No one can predict every health emergency. But drivers who have experienced seizures, fainting episodes, blackouts, or other events affecting consciousness should speak candidly with their physicians about whether it is safe to drive.
If there is uncertainty, the safest choice is not to drive. Use a family member, rideshare service, public transportation, delivery service, or another alternative until the condition is medically controlled and a qualified provider confirms that driving is appropriate.
That decision can protect the driver, passengers, pedestrians, cyclists, and everyone waiting at the next red light. The allegations in the Military Trail case are especially troubling because investigators say Diaz recognized the possibility of another seizure before she drove. A known risk cannot always be eliminated, but it can often be managed. Choosing not to drive may be the most important safety decision a person makes.
About Fetterman Law
Fetterman Law represents families affected by wrongful death, catastrophic injury, multi-vehicle crashes, and collisions involving negligent or medically impaired drivers throughout Palm Beach County, Martin County, St. Lucie County, Indian River County, Okeechobee County, and the Treasure Coast.
When a serious crash involves a known medical condition, the investigation must move beyond the initial police report. It may require a careful review of prior incidents, driver knowledge, medical restrictions, insurance coverage, traffic evidence, and every party whose actions contributed to the harm.
If you or your family has been affected by a serious crash, contact Fetterman Law for a free consultation. There are no attorney’s fees unless compensation is recovered.
