COMMERCE CITY, Colo. (AP) – A man found dead Sunday outside a Phish concert near Denver has been identified as a 26-year-old South Carolina resident.

The Denver Post reports that police do not suspect foul play in the death of Trevor Jackson of Salem, S.C.

The Adams County Coroner’s office says the cause of death hasn’t been determined.

Commerce City police were called to the camping grounds outside Dick’s Sporting Goods Park around 10:45 a.m Sunday, when other campers found Jackson slumped over in a chair. Other campers said Jackson had been that way for several hours and had been checking on him.

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(credit: CBS)