The kidnapping and the rescue of Jaycee Dugard, 18 years after the crime, stunned the nation this past summer, leaving many to ask why wasn't the alleged kidnapper caught sooner and how could there have been so many missed opportunities. Now, Dateline investigates and brings viewers up to date on the latest developments on the case. NBC's Keith Morrison reports. See it Friday at 9 p.m. ET, 8 p.m. CT.