Dallas Cowboys fans were shocked and saddened to hear news of former tailback Marion Barber's death on June 1. On Monday, the Collin County medical examiner's office revealed that Barber died of heat stroke in his Dallas apartment.

Frisco police released an incident report on June 1 after they found Barber dead while conducting a welfare check, but there were few details on the circumstances of the tragedy. USA TODAY's Tom Schad reported Monday that Barber died of heat stroke, according to an autopsy obtained by the publication. The autopsy reportedly detailed the condition of Barber's apartment when police found him.

“According to the autopsy report, one of the bathtub faucets in Barber's apartment was running when officers arrived, and the unit's thermostat was set to 91 degrees with the heat set to ‘on,'” Schad noted. “Officers also found exercise equipment in the unit.”

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The coroner in charge of investigating Marion Barber's death added to the autopsy report that Barber was known to work out in “sauna-like conditions,” and that none of Barber's family members had heard from him for at least six days before his body was found.

“…the Marion I will never forget was a young man that had a megawatt smile that could turn your day around in an instant,” former Cowboys quarterback and teammate of Barber's Tony Romo wrote in a Twitter post following Barber's passing. “His huge heart and presence were felt the moment he walked through the door. He could bring the whole locker room together in an instant.”

Barber was 38 years old.