Van Driver

He was mentioned by the teacher as "Scary" Before crashing his van in the desert (Theres no one in the van for unknown reason). Even though it is unknown if the note and the speeding van event have something in common, The status of the driver is also unknown. Hes mentioned on a note found at the bridge. The van driver could possibly be a bandit who was not paying attention to the van so they tried to rob the professor