Patrick Shawn Betz, known as Shawn, was 11 when he vanished from Upland, California, on January 20, 1988. He told his mother he was going with a friend to a basketball game at Upland High School, but the game was actually in Chino. He was last seen at The Pizza Chalet on Foothill Boulevard and Euclid Avenue playing video games with a friend, then leaving with an unidentified juvenile male. The family reported him missing the next morning.

Investigators initially considered that Patrick might have run away after a school incident that required juvenile court, but his parents disputed that theory because he left behind his favorite blanket, which he always took when upset. Owners of the Pizza Chalet briefly drew suspicion after closing the restaurant and leaving the country, but no evidence tied them to the disappearance. Various tips and sightings have been reported over the years without producing a breakthrough.

Does anyone who knew Shawn, the friend he was with that night, or who was at the Pizza Chalet on January 20, 1988, have information to share?