A school bus driver was arrested early Sunday on suspicion of drunken driving after police found him at the wheel of the bus, which was stuck in a muddy median outside downtown Fort Worth. …. A witness told police that he “had seen a school bus driving on the road in a dangerous manner,” Knight said. The driver, Joe David Stanley, 50, told police that he worked for First Student, a national corporation that contracts with school districts for student transportation. The company also charters the school buses for private events. Police said Stanley told them that he had driven a wedding party to Allen and gotten lost on the way home to Joshua. Stanley had a blood-alcohol level of 0.15, higher than the legal limit for driving, police said. Joshua school Superintendent Fran Marek said drivers are supposed to put First Student magnets on the side of a bus to cover the school district’s name when the buses are used for after-hours charter services. “He was not a Joshua ISD employee; he was a First Student employee,” Marek said. “Was that a Joshua ISD bus? No, that was a First Student bus.” …..