Fifty-five-year-old Vicki Lee Crum was in front of her Silver Spring home on Oct. 12 when she told her sister that she was going to take a walk, police said. She hasn't been seen or heard from since.

The woman's vehicle remains at her residence, which is located in the unit block of Aquarius Court, police said.

Crum's family and friends are clueless about where she went, said Montgomery County police Officer Chris Malouf.

"They have no idea," Malouf told The Washington Examiner.

There are no apparent signs of foul play, and Crum does not have any documented mental-health issues, Malouf said.

The missing woman is not married, and police are not aware of her having any children. Malouf said that, as far as he knew, Crum lived by herself.

Crum is described as a white female, 5 feet 4 inches tall, weighing about 130 pounds. She has blue-green eyes, brown and gray shoulder-length hair and a small mole under her right eye.

Anyone with information about Crum or her whereabouts can call Montgomery County Police's 4th District Investigative Section at 240-773-5530. People can also call the police nonemergency number, which is 301-279-8000.