Luis Alonso Jimenez-Villalobos, known as Flaco, was 23 when he was last seen in Mesa, Arizona, on June 14, 1999. Beyond that single last-seen date, very little is recorded: no confirmed whereabouts, companions, clothing, possessions, or appointments are listed from the day he vanished.

Luis was described as Hispanic and Caucasian, between five feet and six feet tall, weighing roughly 130 to 180 pounds, with black hair, brown eyes and a small scar over his left eyebrow. A NamUs file and a Mesa Police Department record exist, but the official account is sparse and the case is treated as a cold case.

Who in Mesa around June 14, 1999, remembers seeing Luis or has information that could help explain his disappearance?