Sneak peek: Guilty Until Proven Innocent

"48 Hours" Presents: Two friends convicted of rape claim neither did it. Their families stuck by them. Now, more than 20 years later, a new DNA test will change everything. Correspondent Maureen Maher investigates Saturday, Dec. 9 at 10 p.m. ET/PT on CBS. "48 Hours" investigates the most intriguing crime and justice cases that touch on all areas of the human experience including greed and passion. For 27 seasons, "48 Hours" has developed a rich history of original reporting and impact journalism that has helped exonerate wrongly convicted people, caused cold cases to be reopened and solved, and along the way changed lives. Check local listings for "48 Hours" broadcast times.