girls who took life for granted, and i wasn't that kind of person, you know? i dressed respectably. i never showed my body off. ever. >> but this florida teenager's life took a terrifying turn when she was trafficked by an unlikely criminal, a fellow 16-year-old girl. >> i was such a trusting teenager. like i thought that everybody liked me and everybody wanted to be my friend and nobody would hurt me. >> 200,000 to 300,000 of our children are at risk of it every year, our children, united states citizens. >> brad dennis runs rescue and recovery for klaas kids, the national organization dedicated to saving missing children. he says shauna's case shows the alarming growth of the disappearance of american kids, 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