Sarah Harrington , a 20-year - old Georgia Tech student , disappeared in October 2009 . Her remains were found on a beach the following year . Authorities have linked her disappearance to the murder of Hannah Smith .
Morgan Harrington , a 20-year-old Virginia Tech student , disappeared in October 2009 . Her remains were found on a farm the following year . Authorities have linked her death to the disappearance of Hannah Graham .