>> kristen drove over to the apartment complex in bryan, texas. that's the town next to college station. >> the door is open. there's a few people inside. there's some music playing and people having some drinks. >> she struck up a conversation with her friend's upstairs neighbor. he was 24, hadn't been to college, but mixed in easily with the students. was he kind of a likable guy? >> he seemed very likable. yeah. he was very personable. seemed very nice. >> in fact, he had no problem sharing intimate details with kristen about his personal life. >> he had been married, and somehow the conversation, you know, goes into him telling me how he had found god. i made a lot of mistakes. i wasn't a great husband. >> you guys got into quite the personal conversation for having just met. >> oh, yeah. well, i mean, i was young, and i think that was normal, and he was drunk. >> not long after the party started, it abruptly ended. kristen's friend, hosting the party, got into a fight with her boyfriend. >> there was alcohol involved. it was a worry that it w