Just 48 hours before Christmas, 1975, 21 year old Carol Rofstad was bludgeoned and left for dead on the lawn of the Delta Zeta sorority house at Illinois State University. She never opened her eyes again. Her friends and family believe whoever killed Carol was the same person who attacked her in a darkened sorority bedroom the prior summer. And they believe that man is still alive. Why was he never charged? Why was he never even interrogated? Two investigative reporters and a career Chicago homicide cop uncover the missed leads, missteps and shocking new revelations in a case nearly a half century COLD. New Episodes Every Thursday.