Alexis MurphyVolunteers are heading out this weekend to search for a Nelson County teenager who was last seen August 3rd.  The search for 17-year-old Alexis Murphy will start Sunday in Lovingston, where she was last seen at a gas station.  Volunteers who want to join the search are asked to meet at E.C. Glass High School at 10:30 a.m. Sunday. 48-year-old Randy Taylor of Lovingston has been charged with her disappearance; he denies the charge.