At Auburn, university officials have repeatedly reassured students they are safe. "I want to remind all of you to please be aware of your surroundings at all times, both on campus and off, and if you are traveling at night use the buddy system," Johnny Green, the Auburn dean of students, wrote in a message to students. "We'll continue to be vigilant in our efforts to ensure your safety, but we want you to take that responsibility for yourself, too."
Auburn police have beat back speculation that Burk's slaying might be connected to the unsolved disappearance in June 2006 of 24-year-old Auburn University graduate Lori Ann Slesinski. In that case, the woman's car was found ablaze less than a week after she was reported missing along a road.
A public memorial will be held for Burk, a pregraphic design major and a member of the Delta Gamma sorority, Saturday evening in Georgia. Burk's funeral will follow Sunday, and a vigil will be held at Auburn Monday.
ABC News' Dean Schabner contributed to this report.