don't want to just give up. >> while the brothel knows that zoe has worked illegally in the past, she tells me she hasn't quite given up that life. what are the biggest differences between working at a legal brothel versus being on your own? >> a big difference for me is the money. right before i came here, i had a guy that he partied for two, three days, and i made $20,000. >> but you also put yourself at risk. >> yeah, it is getting really dangerous right now. that's why i'm here. >> in every corner of america, women are risking their lives by working in the shadows. violence often goes unreported. but some crimes do make headline news. >> intimate escort ads are linked to horrific deaths in detroit. >> l.a.'s five men have been arrested and charged with robbing escorts. >> all of the victims are prostitutes. >> but inside this legal brothel lies a different reality. staff security monitor who comes in, and any clients behaving