Filemon Martinez Caballero, also recorded as Fernando Martinez Caballero, was 27 when he was last seen on May 20, 2002, in Douglas, Arizona, near the U.S.-Mexico border. He is described as a Hispanic/Latino male about 5 feet 5 inches tall and 150 pounds, with black hair and brown eyes. Distinctive features include black dermatitis markings on his legs, hands, and neck and a scar on the left side of his forehead shaped like the number 7. Clothing reported at the time included size 32–34 pants and size 6 shoes.

The trail went cold after that last reported sighting. The disappearance was later logged with the Pima County Medical Examiner’s Office on February 2, 2009, as case MP15700, and the case remains open. Very little is publicly known about the events leading up to his disappearance or any sightings after May 20, 2002.

If anyone saw Filemon in Douglas or along the border around May 20, 2002, or has information about his whereabouts, please come forward.