Missing children heartbreak; Help us!

A prime mission for "Crime Stories" is to raise awareness of missing children cases with the hopes that someone somewhere knows something that could help find these precious boys and girls. This National Missing Children's Day episode focuses on several cases Nancy Grace has followed closely for years. Guests include victims' advocate Marc Klaas, Daphne Young of Childhelp, and Cold Case Research Institute director Sheryl McCollum. We also include a sad update to the Lucas Hernandez case,. The 5-year-old Kansas boy was found dead Thursday. Forensics expert Joseph Scott Morgan, Atlanta juvenile judge Ashley Willcott, and& co-host Alan Duke join Nancy.