reporter: a 9-year-old girl and her 5-year-old brother sitting for a photo. now at the age of 20, that same brother sits by himself. at a memorial built for his sister. amber hagerman disappeared from this texas parking lot 15 years ago this month. their mother is donna norris. well, here is amber s collection of barbie dolls. she loved her barbie dolls. she had 27 all together, and this is her most prized possession right here. reporter: amber was a precious and precocious third grader, who had been interviewed by dallas tv station wfaa for a story on single parent homes. you got a principal s award here for excellence. that s a big deal, isn t it? yes. what did you do to get that? i had to get an honor roll, a-been honor roll and do good things in the class and help. reporter: the tv station also took video of amber and her