Gilberto Pena Contreras, 26, was last seen July 11, 2005, in Sasabe, Arizona, a tiny community on the Sonoran Desert side of the U.S.-Mexico border. He is described as Hispanic, 5 feet 3 inches, about 165 pounds, with black hair, a chickenpox scar and a roughly 10-centimeter scar on his left hand. He was wearing blue jeans, a shirt described as gray, beige, or blue, white tennis shoes with red stripes, and carrying a green backpack with red stripes.

Reports say he was last observed crossing the U.S.-Mexico border. No confirmed sightings, witnesses, or physical evidence have been made public since that day. The disappearance was not reported to the Pima County Medical Examiner’s Office until July 10, 2009; the case was added to NamUs on July 30, 2012, as MP15841.

If anyone saw Gilberto in or around Sasabe in July 2005, or has information about his movements that summer, please share what is known with the Pima County authorities.