Two unsolved cases involving Virginia Tech students are relying heavily on tips from the public.
Investigators are trying to put together the pieces of both the David Metzler and Heidi Childs murders and the disappearance of Morgan Harrington.
Blacksburg Police have told News 7 the cases are not connected, but there are still plenty of unanswered questions.
"Bad things happen, unfortunately, to college students all the time. Its just because it's Virginia Tech they get picked up even if they're not in the area," explains VT student William Kelly.
Don Childs wants the story to remain on people's minds because no one has been arrested for the murders of his daughter and her boyfriend.
At the same time, Gil and Dan Harrington hope for the safe return of their daughter Morgan Harrington.
"Whenever my mind starts to go into any of those avenues, what she could be experiencing, I can't go there. I reign my mind in because I don't want to go there," says Morgan Harrington's mother, Gil.