an estimated 300,000 forced into prostitution in the u.s. each year. >> it's happening in every major town, every little suburban area, every rural area. it's happening all over the united states. >> it happened when shauna began an innocent friendship with a new girl junior year in high school. >> it was a girl i went to school with. i met her through ged classes and she was a really good friend. >> shauna says that girl, a 16-year-old, we'll call cathy, worked hard to gain shauna's trust and within months a deep friendship was born. >> we would always talk in class. i would always tell her, "me and my mom are arguing again, of course." >> it was my gut instinct as a mother to keep shauna away from her. >> shauna's mother lisa said from the start, her daughter's fast friendship with kathy made her uneasy. >> when i first met her at school, she came out to the car and shauna got in the car and i told her to stay away from her. >> i was like, "my parents aren't controlling, you can come over to my house and we can do whatever we want to do. you want to go out and drink, we can go out and drink. my grandpa will even let us