Anthony Myron Mack, who also used the name Robert James, was 47 when he was last seen on January 4, 1988, on Sac and Fox tribal land near Stroud, Oklahoma. He is described as about 5 feet 8 inches to 5 feet 9 inches tall, 140 to 150 pounds, with brown eyes and graying hair. Reports say he may have been fishing at the Deep Fork River when he disappeared.

The case has involved Sac and Fox Nation Law Enforcement, the Bureau of Indian Affairs, and the Oklahoma State Bureau of Investigation. Tribal land spanning Lincoln, Payne, and Pottawatomie counties is listed as his last known location, which has complicated the search. No concrete leads or witnesses are reported, and the disappearance remains unresolved.

If anyone knew Anthony, saw him around January 4, 1988, or has information about his activities near the Deep Fork River, please come forward with what you remember.