Killer App - Encore
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(upbeat music) - Every time I seen her she would be texting for Facebooking and she was constantly on her phone. - I'm Nicole Lovell and I've been nominated for the ALS Ice Bucket Challenge. - She's a happy go lucky kid. - Yes! - She's my own, she's saying all the time. - Give me, just one, such, and baby, I believe. - Tonight the search intensifies for a missing teen from Blacksburg. Take a good look. This is Nicole Lovell. She's 13 and was last seen in the lantern ridge area of Blacksburg between midnight and seven Wednesday morning. Her father posted this message to Facebook. - Nicole, honey, if you see this, if you're out there, you can come to me. I'm not mad at you, I'm worried about you. - She's looking into whether an app popular with teens was used to lure the girl. - That night I was gonna knock on the wall and tell her to come in and sleep with me like she usually does, and I didn't do it. It's with every heart that I have to announce that we've located the remains of 13-year-old Nicole Madison Lovell. - 100 secum en route, 89 west, snowbird curve. So where was Nicole Lovell's body? - Nicole was from what we understand in the trunk of the car, and they move it right over here, got close to the edge and just... - A very preliminary determination of the cause of death is stabbing. (dramatic music) - I went to high school with David Eisenhower. Everything he did, he worked hard at, and he wanted to be the best at. - Investigators have said the 18-year-old college athlete and engineering student knew the little girl and, quote, used the relationship to his advantage to abduct her. - At 12.39 a.m., just past midnight, Cole sends her last electronic message to Dr. Tungsten. David Eisenhower's kit account username. - How are we going, Daniel? If I didn't do anything wrong. - A second Virginia Tech student, Natalie Keepers, has also been charged.
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Two promising college students stand trial after a teenager is lured to her death with a smartphone app. "48 Hours" correspondent Peter Van Sant updates the case.