Rapper's Associate Waved Around Constitution During Stop of Tour Bus

Cops eventually towed the bus to a police lot, got a search warrant, and arrested 2 Chainz and his entourage

You'll recall, cops pulled over 2 Chainz' bus because of a busted taillight, but upon approaching the vehicle … cops say they smelled pot and attempted to search the bus.

But the driver refused to let cops on board—and according to the police affidavit which was just released, one of the bus' passengers actually held a physical copy of the U.S. Constitution against the bus window … "as if challenging officers" with his civil rights.