CHARLOTTESVILLE, Va. (AP) _ The parents of a missing University of Virginia student are appealing for whoever is responsible for the disappearance to help them find their daughter. Sue and John Graham, whose 18-year-old daughter Hannah disappeared on Sept. 13, issued a statement on Saturday in which they describe the case as a nightmare. They note that despite thousands of tips from the public, the college sophomore has not been found, adding, “Somebody listening to me today either knows where Hannah is, or knows someone who has that information.” A 32-year-old Charlottesville man, Jesse Leroy Matthew Jr., has been charged by authorities with “abduction with intent to defile” in the disappearance of Graham. Police say forensic evidence also connects Matthew to the 2009 death of Morgan Harrington, a 20-year-old Virginia Tech student.