A Dallas businessman has been missing for three weeks since he was last seen pumping gas after a gym session, police said.

Alan White, an executive at accounting firm KPMG, was reported missing after he never returned from an Oct. 22 workout at LA Fitness in Dallas, news station WFFA reported.

He left the gym about 5:40 a.m., then was captured on surveillance video around 6 a.m. at a gas station filling up his car, police said.

Rusty Jenkins, White’s partner of 18 years, said he became concerned when White didn’t return immediately after his workout.

“When he wasn’t home at 6:15, I thought it was odd. When he wasn’t home at 6:30, I knew something was wrong. When he wasn’t home by 6:45, I was panicking,” Jenkins said.

Jenkins said he jumped in his car and drove the route back and forth to the gym, fearing White had been in a car accident.

“I was calling the hospitals trying to find out if there was an unidentified John Doe in any of the hospitals, because I didn’t know if he had his ID with him or not,” he said.

Days after White’s disappearance, authorities tracked down his missing vehicle in South Dallas, though he was nowhere to be found.

The family is calling on members of the public to come forward with any information that might help locate the missing businessman.

They’re offering a $15,000 reward for any information that leads to his whereabouts.

“I’m not going to give up hope at all. Until they tell me that he’s gone. Somebody has to know something,” White’s mother, Maralu Craven, told the news station.