Sergio Lopez Caal was reported missing from Urbana, Illinois, on November 12, 2023, at age 18. Public missing-child notices describe him as a Hispanic male with black hair, brown eyes, glasses, approximately 165 cm tall and weighing about 54 kg. Two photographs on the poster are identified as Sergio.

Notices do not describe the circumstances of his last sighting, who he may have been with, or why concern was raised. Public appeals identify both Urbana and Chicago as places where he may be located, but no confirmed sighting, route, or reason for travel to Chicago is included in the available notices. The missing-person poster asks anyone with information to contact the National Center for Missing & Exploited Children at 1-800-843-5678 or the Urbana Police Department at 1-217-384-2320.

If anyone knew Sergio, saw him in the Urbana or Chicago areas after November 12, 2023, or has other information, please come forward.