Gerber Zainos-Beltran was 12 when he was last seen in Mexicali, Mexico, on March 1, 2013. He left a note saying he intended to travel to the United States to find his mother, who was living in Irving, Texas at the time, and has not been seen or heard from since.

At disappearance Gerber was 5 feet 2 inches tall, about 120 pounds, with brown hair and brown eyes. His case is listed in missing persons databases in both Mexico and the U.S., and despite efforts to locate him there have been no significant developments.

Gerber’s case underscores the difficulty of searches that cross international borders. If anyone has information about his whereabouts or remembers seeing him around March 1, 2013, please contact the appropriate authorities.