Several law enforcement agencies are working to track down a 14-year-old Walker County girl who has been missing for weeks. The FBI in Atlanta along with LaFayette Police  are asking for help to find Graycie Millard. Authorities said she has been missing from her home since July 27. She’s described as having black hair and blue eyes, weighs around 115 pounds and stands at 5-feet 6-inches tall.  People who may know of Millard’s whereabouts are asked to submit tips to the National Center for Missing and Exploited Children here.