WATCH: No leads three days into search for Sarah Stern: Part 4

WATCH: No leads three days into search for Sarah Stern: Part 4

Transcript for No leads three days into search for Sarah Stern: Part 4

Thanks for coming in, man. No problem chblt. I’m Brian. I’m a detective with the prosecutor’s office. Nice to meet you, Brian. The goal of that interview was for me to get to meet Liam. And also speak to him directly in an effort to find Sarah. He was being cooperative with he was helping in the search efforts. He was always cooperative. He answered all their questions. Who do you live with, Liam? I live with my roommate, Preston. Preston Taylor. Is he friends with Sarah also? Yeah. We all went to high school together. Okay. He had been questioned at this point, several times, and was looking to give any information he could. And what’s the extent of your relationship? I would say we’re pretty close friends. Was she ever your girlfriend? No. Sarah’s friends and family portray her as this happy go lucky girl that never had any reason to say she would hurt herself or hurt someone else. But Liam portrays a different picture. Okay. Does she ever talk about liking guys or — Not that I know of. Girls? No. She has been known to obsess over girls in the past though. He talks about an ex-girlfriend of his, Maggie, who Sarah became obsessed with. She just would always say stuff like, “Maggie, if you don’t come here right now, I’m going to kill myself.” During his interview with detectives, Liam also asks them this question. One thing I wanted to talk to you guys about was if she did jump off the bridge, what are the odds that she’s not somewhere all the way out in the ocean by now? What kind of question is that? I don’t understand what the fascination is about that particular statement. He’s asking a question because this is a boy in a room with two men who are trying to figure out what happened to his best friend. What was interesting when he asked the question, he also waved with his hand, he gestured. I found the question very odd. I would’ve expected him to ask us questions like, “What are we doing to find her?” Liam didn’t ask any of those questions. Did she tell you she was going to jump off the bridge? No. If she had told me that she was going to jump off the bridge, there would have been no way that I could have gone to work that night. She’s been saying she needs to get away, go to Canada. Get away from her dad. I think Canada was a place that she had been, that she had a great experience at. It was something that she talked about potentially moving there. Is she in Canada? I couldn’t tell you. I can’t honestly tell you that. I’m one of her closest friends and I have no idea why she wouldn’t tell me anything before she left. When did you last see Sarah? When I was leaving her house to go to work. It’s interesting because Liam is very chatty in these initial first interviews, but eventually time runs out. He hires a lawyer, and he stops talking. I just thought to reach out to my aunt who is a lawyer, and she said, “You really shouldn’t have Liam meeting with any detectives or police without a lawyer present.” So your mom contacted an attorney on your behalf, and your dad contacted an attorney on your behalf. We’re not going to talk to you any further today. We do appreciate you coming down. Any good lawyer is going to tell a client in this situation, “Stop talking. Don’t talk to the police.” Liam mcatasney stops talking with police. And so, investigators turn to his friend and his roommate, Preston Taylor, to try and get some answers. Doing all right? Yeah. Thanks for coming down to talk with us. What did Liam tell you about the day he spent with her? He said nothing that really seemed out of the ordinary. Everything that Liam had told us, Preston had confirmed. There were no real inconsistencies that they presented. At one point in the interview, police ask Preston what he thinks happened to Sarah stern. And if you watch and listen closely, you’ll hear his voice slightly crack. His hand reaches up to wipe something from his eye. What do you think has happened? I think she jumped. Why do you think she jumped? Just from the stories that I heard about what goes on with her and her dad. I went down that night and watched his statement. When Brian came out of the statement, he said, “Something’s not right here, at all.” I did not have a good feeling about the information that both Liam and Preston had told us. I wasn’t satisfied that something didn’t happen to her. So now the police are into a number of days into this investigation, and they don’t really know what happened to is she dead? Is she alive? They have no body. But here’s the thing that really gets detective’s attention. Sarah has a safe deposit box at the bank. The bank in and of itself became a big deal. Became a big deal.

This transcript has been automatically generated and may not be 100% accurate.

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