is compiling a database for all human trafficking cases in the country. >> we've seen cases involving 12- and 13-year-olds in small towns. we've seen cases involving young girls in the big cities here. >> so in your mind these girls, boys, they are the equivalent of modern-day sex slaves. >> they are modern-day slaves, on the streets all around us. >> i can remember the first day it actually happened, like it was yesterday. >> for tina, like a majority of the young women and girls sold for sex, the road to a lifetime of exploitation was paved with violence. >> they're going to beat you, kill you, or overdose you. one of the three, you're going to leave here in a very tragic way. >> tina's childhood nightmare started when her mother sold her to two neighborhood men. it began in kindergarten and it began with rape.