The Amarillo Police Department is asking for the public's help in finding Melvin Wayne McKnown, 80, and a Silver Alert has been issued for him.
Police said McKnown was last seen driving a white 2023 Chevrolet Malibu with Texas license plate WSY-6296. He may be with a dog of an unknown breed. His cell phone last showed a pinged location in Santa Rosa, New Mexico, at about 7:30 a.m.
Police said McKnown has several serious medical conditions, including dementia, lung and heart disease, and diabetes, and is at risk of falling. He does not have his medication with him. He is described as 5-foot-11, 210 pounds, with short gray hair, a gray mustache and green eyes.