RED OAK, Texas -- A Silver Alert has been issued for Robert Raymond Gibson, 74.
Gibson is described as a black male, 5 feet, 7 inches tall, weighing 168 pounds.
He has gray and black hair and brown eyes.
Gibson was last seen in Red Oak, Texas wearing a turtleneck, jeans and white shoes at 10 a.m. on Friday, November 1.
He is driving a white, 2005 Chevrolet Trailblazer with a Texas license plate DH7G899. (Editor's Note: A previous version of this story had a different license plate number. This is the correct number.)
Gibson is diagnosed with a cognitive impairment and law enforcement officials believe his disappearance poses a credible threat to his own health and safety.
If you have any information, call Red Oak police at (972) 617-7632.