Thursday marked three weeks since Ralph Latrez Bell had an argument with his fiancee and left his home in Stillwater.

He hasn’t been seen since.

Police say Bell, 24, left his apartment in the 1600 block of Greeley Street around 10 p.m. Dec. 20. The blue Chevrolet Impala he was believed to be driving was found an hour later with the engine idling in the 800 block of Cope Avenue West in Roseville; someone reported the unoccupied car to Roseville police. Witnesses told police that they saw the car speed to the end of the dead-end street and stop; a man got out and ran off.

“The engine was running, and the keys were in the ignition,” said Stillwater Police Chief John Gannaway. “There was no sign of a struggle.”

Stillwater police have been investigating tips, “but so far nothing has come to fruition,” Gannaway said.

Friends and family members of Bell’s have been passing out “Missing” fliers in Stillwater; Bell and his fiancee have two children and are expecting a third.

Bell’s mother, Corhea Taylor, told KMSP-TV that she believes something happened to Bell in Stillwater.

“I know that it all began here,” she said. “Me, as a mother, in my opinion, I really don’t think my son had the opportunity to leave here. Whatever happened to him, I think happened to him from this building. I’m just waiting for answers.”

Bell stands 5 foot 6 and weighs 155 pounds. He was last seen wearing dark-colored work boots, blue jeans, a navy-blue shirt with the letters “TC” on the chest, and a green cargo jacket.

“We don’t know what happened,” Gannaway said. “I wish we did, but we don’t. We will keep investigating and following up for as long as we can.”

Anyone who has seen Bell or has information about his whereabouts is asked to call the Stillwater Police Department TIPS line at 651-351-4945.