Sergio Aquayo was 28 when he was last seen in Chula Vista, California, on June 27, 2005. Details about that day are scarce; the circumstances of his disappearance are not described and public information offers little beyond his last known date and place.

Aquayo is listed in several missing person databases and his case remains open.

If anyone in Chula Vista in June 2005 remembers seeing Sergio or has information about where he might have gone afterward, please come forward.