we interviewed her roommates, boyfriend. everyone is a suspect. and then a man said i kidnapped her, we have her, we ran the criminal history. that s when all the bells went off. he pulls in, asking me to get in the car. i feel the cold blade against my neck. he carries cme to the basement of his home. it was jaw dropping, just chilling. they started digging and they found women s clothing. it was escalating. there were so many victims? yes, there still are. until this guy is in longer in existence. i ll carry this fight. ecome a supreme court justice. ge, hello and welcome to dateline. shannon melindi dreamed big. at 15 she wanted to become a supreme court justice. in college she scored a foundation. detectives had a suspect in their sight, but it would take years. a horrific tail to unravel the mystery of shannon s disappearance. here is dana murphy with shannon s story. reporter: the videos, the document reof her life. reporter: the professional dad