It's been three weeks, and there is still no sign of 82-year-old Hal Ticknor.
Ticknor, who has dementia, left his home on Morningside Drive in Garland on Oct. 11 headed for the store. A Silver Alert was issued, but he hasn't been seen since.
Police said Ticknor asked for directions to Garland while near Tioga on Friday afternoon at about 4:30 p.m. At 9:15 p.m. that night, Ticknor used his credit card to purchase gas in Valley View.
Since that time, there have been no verified sightings of Ticknor or his silver 2007 Chevrolet Equinox with Texas license plate 599-SNC.
Friends and members of Ticknor's church organized a search effort for him. Dozens of volunteers went out in two-member teams, driving on country roads and knocking on doors throughout Denton and Cooke counties.
"If we could just find someone who says, 'Oh, I saw him,'" volunteer Jo Crom said. "It only takes one person."
Garland police describe Ticknor as a silver-haired man with green eyes who stands 5 feet 11 inches tall and weighs 170 pounds
Law enforcement officials believe Ticknor's disappearance poses a credible threat to his own health and safety.
If you have any information regarding Ticknor's whereabouts, please contact the Texas Department of Public Safety's State Operations Center at 512-424-2208.