Jerry Brown Jr., 25, was killed, and Josh Brent, 24, was arrested for intoxicated manslaughter after the car driven by Brent crashed early Saturday in Irving, Texas.
At the scene of the accident Brent refused to name the club they had visited, the arrest affidavit said, but a Dallas radio station reported Brent and Brown patronized the private club Private Dallas that evening, and a Twitter account registered to Private Dallas posted, "Cowboys! Surprise celeb guests!"
If violations are found, the club, which a Commission official did not identify Sunday, could be fined or have its license permit canceled, the Fort Worth Star-Telegram reported Monday.
"We're establishing where they had been and if they were sold alcohol while they were drunk. The investigation could take days or it could take months," said commission spokeswoman Carolyn Beck, adding agents will interview patrons, bartenders and any other witnesses in the club.
Police said Brent was driving at high speed when his car struck a curb and flipped at least once.
As Irving police officers arrived on the scene, Brent was dragging Brown from the burning car, authorities said, adding Brent was able to speak to officers but Brown was unresponsive. Brown died at Parkland Memorial Hospital in Dallas Saturday morning.