Enoch Police Chief David Browning also believes an old head injury could to blame for the man's disappearance.
A truck driver reported seeing Christopher Robin Coan's 1994 Blazer on Saturday at a Sinclair gas station at the junction of Interstate 80 and U.S. Highway 40.
Browning said the trucker accurately described the Blazer's maroon-over-silver two-tone paint as well as the stickers in the vehicle's rear window.
"I believe the trucker to be fairly credible," Browning said.
Browning said Coan's girlfriend traveled the 250 miles from Enoch to Park City during the weekend to view surveillance camera footage. The outside footage was not available, Browning said, and Coan was not spotted on footage from inside the station.
Coan disappeared Sept. 3 after finishing his shift at a Subway restaurant in Enoch. The search for him has concentrated on the off-road trials around Iron County, where police thought Coan might have driven his recently-purchased sports-utility vehicle.
Browning said there are no more searches planned in Iron County following what he described as a "fabulous job" by search and rescue crews.
Browning said Monday he's leaning toward a hypothesis that Coan is in northern Utah suffering from the effects of a head injury sustained when he was 7 years old. The effects surface occasionally over the years, Browning said, with Coan losing focus on his surroundings and overreacting to minor incidents.
Coan's last hours working at the Subway restaurant in Enoch might have been a catalyst for such an episode, Browning said. The restaurant's manager corrected Coan, a new employee, on a couple of points.
"To the ordinary person it wouldn't be an issue," Browning said.
If approached, Coan is likely to avoid eye contact and deny his identity, Browning said.
Anyone with information about Coan's whereabouts can contact Enoch police by calling 435-586-9445,
