she loved emory. >> she studied political science and scored an internship at the carter center. and now? her determined family leveraged every political connection from their local congresswoman to the former president and got the case on the fbi's radar. the feds were joining the search for the missing college student. >> we interviewed her roommates, we interviewed boyfriends. you can imagine they're -- everybody's a suspect. >> special agent joe fonseca says investigators looked into every aspect of shannon's young life, including a spring break trip she took in the weeks before her disappearance. >> who did she meet with? what hotel did she stay at? who did she travel with? >> and one of the questions at the top of their list, did shannon go off the grid possibly with someone she'd met on spring break? >> we spoke to a lot of people, all those people that she went with. >> including chris goslin. chris and shannon went to high school together, and he was on