UNIVERSITY PARK, Pa. (WJAC) —

The murder mystery of a coed stabbed to death in the Pattee Library at Penn State's University Park campus is now 50 years old.

Who was the killer, what was the motive, and what actually happened?

Decades later, those questions remain unanswered.

Gary Sinderson revisits this legendary unsolved murder, just days before its 50th anniversary arrives. But now, he’ll uncover important details never before revealed to the public.