>> reporter: tara fitzgerald was no typical teenager. at least, that's what her closest friends say. >> she looked at the world so much deeper and with so much more meaning than anyone that i have met. >> most people were worried about prom dresses and she was worried about what kind of things? >> very philosophical. she wanted to know how the world works and how the universe works and how god works. i'd consider her an old soul. >> such an old soul. >> yeah. >> reporter: but tara also had a lighter, more carefree side. >> quirky was the key word when it comes to tara, because she did have a different kind of sense of humor. >> she knew how to make everyone laugh. >> she liked to make faces and her and her friends would act goofy sometimes and they enjoyed that. >> reporter: she lived with her parents, tom and mai, and her little sister, in the quiet, suburban city of woodbury, minnesota, not far from the