Miller was last seen driving a white four-door 1960 Rambler Ambassador outside a bar in Hagerman, Idaho on August 17, 1968. The vehicle has Idaho license plates numbered SG 1488 and the vehicle identification number (VIN) S158632. Miller had two hitchhikers in the car with him at the time of his disappearance. He has never been heard from again. Police suspect he was taken against his will. He left behind a wife, who is now deceased, and children who still hope his disappearance may be resolved. Few details are available in his case.