A 31-year-old Amazon delivery driver died of carbon monoxide poisoning while sorting packages inside her delivery van in Fruitland Park, according to a Lake County medical examiner’s report.

Jaylene Vargas-Gonzalez died Aug. 10. A newly released investigative report from the Lake County Sheriff’s Office provides new details about the circumstances surrounding her death.

About 15 minutes before she was seen falling to the ground inside the van on surveillance video, Vargas-Gonzalez sent a text message to a loved one saying, “This van is giving off a bad smell in the air that’s making me dizzy.”

The medical examiner listed carbon monoxide poisoning as her cause of death. Loved ones told News 6 that Vargas-Gonzalez was a mother of two.

According to the sheriff’s office report, a responding deputy described an “unknown odor that disrupted my breathing.”

Attorney for Morgan& Morgan Milette Weber told News 6 “The autopsy report answers the question about the cause of Ms. Vargas Gonzalez’s death, but serious questions remain about how this could have happened. Ms. Vargas Gonzalez’s family is devastated and desperate for those answers. As they grieve, we are fighting tirelessly to uncover what happened and hold the responsible parties accountable for any negligence that could have contributed to her death.”

Investigators also reviewed Amazon logistics data showing Vargas-Gonzalez reported the delivery van had become stuck in sand along the side of the road about six hours before her death. She later reported that the vehicle was operational and continued her delivery route.

The investigation also revealed a dent in the vehicle’s exhaust pipe.

Investigators restarted the van’s engine and tested carbon monoxide levels every 10 minutes. The report says the levels increased with each test.

Michael Crossen, manager of auto tests for Consumer Reports, said a damaged exhaust pipe can allow carbon monoxide to escape before reaching the rear tailpipe.

If the gas escapes beneath the vehicle’s cabin, it can enter the area where the driver is working.

Crossen said anyone experiencing symptoms such as dizziness, sleepiness or lightheadedness should stop driving, turn off the vehicle and get fresh air. He also urged drivers to call for help.

News 6 contacted Amazon to ask whether the delivery van was equipped with a carbon monoxide detector and are still waiting to hear back.