civil rights lawyer damon hewitt, representing the university of north carolina, says affirmative actionl. >> when you think about a world without affirmative action, think about what our work places would look like, what our schools would look like. >> reporter: now, opponents of affirmative action say there are other, race-neutral ways to get diversity, like looking at socioeconomic factors. and that was the focus of several of those conservative justices, who seemed to suggest the clock on affirmative action is ticking. norah. >> o'donnell: jan crawford with those important arguments today. thank you. and, we learned today the identity of the man who's been charged with murdering two teenage girls in delphi, indiana, nearly six years ago. 50-year-old richard allen was arrested friday after police made a big break in a cold case. allen worked at a cvs pharmacy in the town, allegedly developing photos for the families of the girls for free. the grandparents of one victim, 14-year-old liberty german, says they always felt the killer was close by, hiding in plain sight. >> nothing's ever