Her body was found three months later in a remote field near Charlottesville.
Three months ago, police tied DNA evidence from the crime scene to a 2005 sexual assault in Fairfax County.
Harrington's parents were on the Today Show Thursday morning. "The case really has not moved much beyond what we found out when the forensic link was made," said Dan Harrington, Morgan's father. "We know that the case from 2005 is somehow connected to Morgan."