Sheri Mecklenburg, a corporation counsel for the Chicago Police Department, launches the Women's DNA initiative to fund the testing of backlogged rape evidence kits and help rape victims find justice.

A look at the work of college students who take on the cases of jailed murderers who claim they're innocent. With exclusive, behind-the-scenes access to Innocence Projects at the University of Cincinnati and Texas Tech University.

Bill Kurtis narrates this look at the last 48 hours before the scheduled execution of Michael Johnson, convicted in the senseless killing of Jeff Wetterman 11 years earlier.