I was doing some research and found this article, from 2006. I had known about the second case, but not the first one, which is the story of a 15 year-old teen abducted from her own driveway:
http://abcnews.go.com/Primetime/Story?id=1596778&page=1
Teen Girls' Stories of Sex Trafficking in U.S.
Abducted From Her Own Driveway, Teen Says
Debbie's story is particularly chilling. One evening Debbie said she got a call from a casual friend, Bianca, who asked to stop by Debbie's house. Wearing a pair of Sponge Bob pajamas, Debbie went outside to meet Bianca, who drove up in a Cadillac with two older men, Mark and Matthew. After a few minutes of visiting, Bianca said they were going to leave.
"So I went and I started to go give her a hug," Debbie told "Primetime." "And that's when she pushed me in the car."
As they sped away from her house, Debbie said that one of the men told Bianca to tie her up and said he threatened to shoot Bianca if she didn't comply.
"She tied up my hands first, and then she put the tape over my mouth. And she put tape over my eyes," Debbie said. "While she was putting tape on me, Matthew told me if I screamed or acted stupid, he'd shoot me. So I just stayed quiet."
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Prepare yourself for some pretty disturbing stuff when you read the rest of the article.