An Amazon delivery driver found unresponsive inside her truck in Fruitland Park died from carbon monoxide poisoning, the medical examiner’s office has determined.

On Friday, the Lake County Sheriff’s Office revealed the cause of death to be carbon monoxide poisoning — ruled an accident.

The medical examiner ruled the death of Jaylene Vargas-Gonzalez, 31, an accident. Her blood carboxyhemoglobin saturation — a measure of carbon monoxide in the bloodstream — was 58% at the time of her death, according to the autopsy report. Testing of the delivery van’s interior with the engine running also revealed elevated carbon monoxide levels inside the compartment. The autopsy found no evidence of traumatic injury and no signs of natural disease.

Neighbor’s Call Led Deputies to the Scene

On August 10, 2026, Deputies were called after a Fruitland Park resident noticed the Amazon truck had been parked near the end of his driveway for several hours.

Patrick Miranda said he called the Lake County Sheriff’s Office non-emergency line after noticing the truck was still running but appeared to be empty.

“I see the phone is still plugged in. The backpack is there and again the car is running, but there is no one,” Miranda said. “It seemed kind of strange.”

Surveillance video from Miranda’s home shows deputies and Lake County Fire Rescue responding to the scene.

Deputy Reacted to Fumes Before Finding Woman

Miranda said a deputy first opened the passenger-side door and reacted to fumes before opening the rear doors and finding Vargas-Gonzalez unconscious in the back of the truck.

“The police officer opened the passenger side front and he had some fumes, he had to reel back from,” Miranda said. “Then he opened the back, the sliding doors, and she was lying there in the back unconscious.”

Miranda said one of the deputies also appeared lightheaded after approaching the truck. Because of concerns about potentially toxic substances, firefighters in gas masks responded and the area was secured. Miranda said Vargas-Gonzalez was sprayed with a fire hose before paramedics began life-saving measures.

“Because they were worried about toxic chemicals, I remember they did use a fire hose to rinse her off to make sure there was nothing on her clothes or person,” Miranda said. “But immediately after that, they were using life-saving measures.”

Vargas-Gonzalez was taken to a hospital, where she was pronounced dead, according to the sheriff’s office.

[RELATED: Amazon delivery driver dies after being found unresponsive inside truck in Fruitland Park]

Amazon’s response

Detectives with the Lake County Sheriff’s Office Criminal Investigation Bureau are continuing to investigate the incident, the agency said.

Amazon released a statement in response to Vargas-Gonzalez’s death in August.

“We’re deeply saddened by this tragic incident, and our thoughts and prayers are with the driver’s loved ones during this difficult time. We’re cooperating fully with local authorities in their investigation,” the company said.