Update: Farmersville police said they discontinued a Silver Alert after finding 78-year-old Roy Horton early Wednesday morning.
Horton had last been seen in Farmersville about 3 p.m. Tuesday driving a maroon 1967 Ford Mustang convertible with a black top, chrome wheels and Texas license plate HSTF1.
Police said Horton's disappearance poses a credible threat to his own health and safety.
He is described as a white man, approximately 5-feet, 8-inches tall and 180 pounds, with balding gray hair, green eyes and eyeglasses.
Anyone with information on his location is urged to call police at 972-782-6141.