Officials in Walker County Georgia say tha the death of t a 15 year old LaFayette High School student that died last week was caused by an accidental overdose of Xanax.  Amber White was believed to have accidently overdosed on the prescription pills while at a relative’s house on Tuesday night.  Funeral services for the teenager were held on Saturday.  Counselors were on hand at LaFayette High School last week as students learned of the death.