Evidence revealed in notorious serial killer Israel Keyes case

In 2012, Alaskan law enforcement came face to face with one of America's most notorious serial killers, Israel Keyes. Over the next seven months, he played a cat-and-mouse game with investigators divulging clues about his other victims. “48 Hours” correspondent Peter Van Sant joined CBSN after getting a first look at evidence in the case and the FBI's investigation.