>> the marcells were raised to be close, they were self-sufficient, and the children looked out for each other. >> how do you think it shipped brittani being number five in this big family? >> she looked up to kathleen, kristin and alicia. >> remind me who is the oldest? >> i am. i think i was her mom, too, and the littlest one has the most moms. >> like her oldest sisters, brittani was disciplined and hard working. >> she was an excellent student. she had a good circle of friends. >> i think she kind of set herself apart from the popular crowd rather than was inside it and that's because she's very genuine in everything she does. >> brittani was headed to college and hoping to be a tv reporter. >> she graduated high school early and she wanted to study journalism. >> but her mom, diane, said brittani hit a rough patch during her junior year in high school.