and it's something that they've missed, that they've probably never had or their own family was too abusive and they're looking for someone that will take care of them. >> hey, guys. you want to give her a shot? she's ready. >> in the day's dying light, the team finally finds what they've looking for. >> female black with a blue dress. >> a very young-looking female working the corner of brockhurst and san pablo. >> yeah, she's in the vehicle. she's in the vehicle, still working. >> he's giving a signal already. he's going eastbound on brockhurst back toward market. he'll be pulling right out on you. >> copy. >> the swoop signal is given and the team makes their ninth arrest of the night. this case turns out to be a little more urgent than the others. >> i'm 17. i'm not doing anything wrong. you can call my folks. say i'm on the way home. >> a 17-year-old we'll call kelly is exactly the sort of girl that police in oakland and human trafficking task forces