David Martinez Lopez was 25 when he was last seen in Nogales, Arizona, in 2007. The only firmly reported detail is that he was observed crossing the border from the United States into Mexico; no exact date or time of disappearance is known.

He is described as a Hispanic male with brown, curly hair and brown eyes, estimated between 5 feet 5 inches and 6 feet 0 inches and 176–180 pounds. Distinctive marks include dimples when he smiles, a cut scar on his right hand, a mole with hair on his coccyx, and a mole on his right buttock. Clothing, transportation, and other circumstances at the time are not reported.

His case was entered into NamUs on July 30, 2012, and the Pima County Office of the Medical Examiner is listed as the investigating agency. Few concrete leads have been published, and the lack of a specific last-seen date leaves the timeline unclear.

Did anyone in Nogales or nearby border communities see David around 2007 or have information about his crossing?