An 81-year-old man died after being involved in a rollover on Tucson's south-east side Tuesday.
Thomas Henry Billeter was driving south on Houghton Road, south of East Escalante Road, at 10 a.m. when his Volkswagen made a hard right turn and drove off the road, according to Tucson Police Department.
The vehicle rolled numerous times down a steep embankment. Billeter was transported to St. Joseph's Hospital with life-threatening injuries. Detectives were notified later in the day that he had died.
No other vehicles were involved in the rollover. Investigators are trying to determine if a medical issue caused the driver to veer off the road.