Car battery hydrogen sulfide fumes cause deaths of mom and daughter


After a rigorous investigation, a medical examiner said Tuesday the deaths were caused by hydrogen sulfide intoxication, likely as the result of a defect in the car’s battery.

The colorless gas has a pungent odor and first responders were forced to retreat from the vehicle after they approached it and saw Lincoln and her daughter, who did not appear to be breathing.

In a release obtained by, the Orange-Osceola Medical Examiner's Office called the manner of death "unprecedented."
"While the source [of hydrogen sulfide] is most likely to be attributed to a malfunction of the battery, this remains to be confirmed. This case is unprecedented.
"Despite the large numbers of lead acid batteries in use worldwide, no other fatalities of this type have been reported. Similar batteries, under experimental conditions, have been shown to produce hydrogen sulfide gas," the statement read.
"The battery was not the original battery for the vehicle, [or] the correct battery and is believed to have malfunctioned," the statement said.
The statement also suggested the deaths were preventable.