Alan Soper left Tulsa in 1974 to travel cross country by helping truck drivers. He last made contact with his parents by phone stating he was the state of California. Later only his clothes and wallet were found in Needles, California. No contact has been made since 1974. Foul play is suspected. Alan Soper is white male, 5'11" tall, 160 lbs., blue eyes, and his age last seen was 22.Anyone with information about this case is encouraged to contact the Tulsa Police Department Missing Person Unit.