told herself, and yet, she was worried. she couldn't reach her eldest, halee, by phone. >> i called her friend ainsley and said, you know, hey, have you heard from halee. >> she's like i know you have her apartment key. can you drive over there and see what she's doing? >> reporter: when ansley did, she saw halee's car parked outside the apartment, meaning halee must be inside. ansley put the key in the front door. >> i swung open the door. i was, like, halee. and i just started screaming her name. like, my stomach had dropped, and i was like, oh my god. i was like, where is halee? where could she be? >> reporter: around the same time, halee's sister emilee was driving to work with a friend. suddenly, a sense of doom washed over her. >> i'm freaking out. something's wrong. >> just, like, out of the blue this feeling came? >> yeah, it was out of the blue. like, we were driving, and all of a sudden, i was just like, you got to turn around. i got to go find my sister. something's wrong. like, i don't know what's wrong, but something's wrong.