Autopsy results show a man who died while attending the Bonnaroo Music and Arts Festival in Tennessee accidentally overdosed on drugs.

The Tennessean cited a toxicology report that said 32-year-old Michael Donivan Craddock Jr. of Mt. Juliet had cocaine, alcohol and high levels of a psychedelic amphetamine in his system when he died.

Craddock was found dead on June 8 in a car at a festival campground.Dozens of people were treated for heat-related issues at the four-day summer festival.

The death was the 13th in the festival's 17-year history.