Coffee County Sheriff Stephen M. Graves said Monday 24-year-old Christopher William Yoder of Raleigh, N.C., died of hyperthermia early Sunday after being airlifted from the festival to Erlanger Hospital in Chattanooga.
Graves said he is awaiting toxicology reports.
According to WTVF-TV in Nashville, Bonnaroo organizers released a statement saying, "The safety of our patrons is our No. 1 concern, and we are deeply saddened by this."
ABC11 has learned Yoder worked for HEA Engineering in Raleigh. His boss told us he had a promising future.
"He was a hard worker, motivated, you know, he was going to go a lot of places," said Adam Renzi.
On Thursday, the body of a 32-year-old woman was found inside a tent at the festival. An autopsy is to be performed.
The 10th annual festival, with 80,000 attendees, was Thursday through Sunday at a 700-acre farm.