children, they're going to be thinking, it's all right for them to do it. >> reporter: rick was gratified that he could make good on his promise to erica's grandmother. but he also got something back from her. >> i drew a lot from judy's strength, because she told me from the get-go that things would work out, and that's a sign of her faith. >> reporter: out of the tragedy, the harper family had pulled together. with her grandparents as her guiding lights, erica's future looked bright. when i caught up with her, she was a playful 6-year-old. we went to the zoo where she briefly stopped her fun and games to talk. they call you the miracle baby. the miracle baby. why do they call you that? >> i'm a special girl. >> a special girl. why are you special? >> i know everything. >> you know everything? what do you know? >> i know about, like, when bananas are rotten, you don't eat them.