josh mankiewicz: enrique arochi was a guy christina had known in school. the party at the same time and had offered to walk with her. how well did you know enrique? i graduated high school with him, but i wasn't-- i was acquaintances with him, i didn't really ever talk to him. and that was pretty much christina's relationship with him too, right? yeah. josh mankiewicz: steven chased down enrique's number from other friends and anna called him. he told me, we did leave together, but we went separate ways. and i said, you telling me you did not see her get into her car? and he said, no. and then i told him, i said, well, no one has heard from her. i cannot find her. we're about to call the police. josh mankiewicz: mark couldn't dial fast enough. my daughter. >> and she hasn't shown up from work. i'm just finding. >> out. >> about this. everybody's freaking out. freaking out. >> does josh mankiewicz: about 30 minutes later, mark got a call back. officer called me and said they found christina's car. it was still parked in the parking garage. it never left. jos