Cherish Perrywinkle kidnap/murder: Mark Klaas speaks out

When Cherish Perrywinkle disappeared from a Walmart in 2013 it took several hours before Jacksonville, Florida, police issued an Amber Alert. By the time word went out, the 8-year-old was likely already dead. Nancy Grace talks to Mark Klaas, the father who has crusaded for better laws to protect children from predators, about what can be learned from the Perrywinkle case.