EMBED >More News Videos The San Mateo County Sheriff's Office says they're investigating the discovery of part of a car under the investigation of a Bay Area man who disappeared before Memorial Day.

MONTARA, Calif. (KGO) -- The 22-year-old San Mateo County man vanished without a trace on his way to work more than a month ago. He was last seen heading into the Devil's Slide Tunnel south of Pacifica. A possible clue was found near Montara State Beach Thursday.Volunteer searchers told ABC7 News a car belonging to Richard Moss was discovered 300 feet north of Montara State Beach on Thursday morning. Officials later clarified that only part of a vehicle was found and they're not sure if it belongs to the missing 22-year-old.Moss was last seen along the San Mateo County coastline.It's hard to go even a few feet without seeing a poster for the young man who's a skateboarder, a Raiders fan, an electrician's apprentice, and now a missing person.The search has become a well-organized effort, led by Richard's father, who has flown out to California from Hawaii in hopes of finding his son."I'm sorry, it's just really tough. I'll be honest with you," said Richard's father Dan.Dan is making his third trip to the mainland after his son disappeared.Moss, 22, was on his way to work and made a stop at McDonald's, drove through the Devil's Slide tunnel and then simply vanished.