Alan Wayne Soper was 22 when he left Tulsa after graduating from Oklahoma State University and set out to travel the country by riding with truck drivers. He last spoke with his parents on June 7, 1974, saying he was in Sacramento, California; that call was the last time the family heard from him.

On June 8, 1977, boys searching near Eagle Pass Wash in the Needles, California desert found weathered clothing and a wallet that belonged to Alan, hundreds of miles from his last known location. Authorities searched the area but turned up no other clues. Alan was described as five feet eleven inches, 160 pounds, with brown shoulder-length hair, blue eyes, a scar on his wrist, a cleft chin, a dimple on his left cheek and some freckles.

The Tulsa Police Department, with assistance from California authorities, lists the case as active. What did anyone in Sacramento or along known truck routes remember about Alan’s travels in June 1974?