(Spokane, WA)  --  Spokane police say the FBI and U.S. marshals are now involved in the search for a missing 16-year-old who's the subject of an AMBER alert.  Authorities say Kiera Inman is likely traveling with 30-year-old Zachary Jones of Newport News, Virginia, in a 1997 Acura with Virgina license plate VGD6867.  Police say Kiera is developmentally disabled and needs medication.  The two are believed to have met online.