Introducing the completely redesigned mercedesbenz ccoupe, with its athletic prowess and sleek new body. It doesnt just raise the bar. It completely crushes it. The allnew cclass coupe. Mercedesbenz. The best or nothing. This is a special edition of nightline. Daughters for sale. Good evening. Thank you for joining us. Tonight a harrowing tale. One teenage daughter on the darkest of journeys. Disappearing into the internet sex trade. Our nightline investigation from the controversial classified site backpage. Com accused of making sex trafficking possible. Heres Gloria Riviera with our special edition of daughters for sale. When i grow up, id like to be a doctor. Reporter they are the sweet dreams of a 7th grade girl. Something i would like to do in my life is go to africa. Reporter but what lay ahead was a nightmare her parents never saw coming. They took everything from my little girl. I live in an american town. How can my kid be sold on the internet. Reporter a few short years after this video was taken, this 15yearold would be sold for sex through the website, backpage. Com. How many encounters do you think you had during that time . Over 150. Over 150 . Yeah. Reporter would that have been possible without back paige. Com . No way. Reporter this led her to join a major lawsuit against back page with other girls like her. Today natalie is 21 years old and a mother herself. Why your decision to speak out . I dont just do it for myself. I do it for other families. Reporter similar to craigslist, its a basic ad site but with sections like escorts and body rubs. Technically Legal Services that Law Enforcement is called thinly vailed code for prostitution. The majority of children sold for sex was trafficked using back page. Reporter now its under investigation by the u. S. Senate. This is one of the last photos taken of natalie before she made the choice that would change her life forever. She ran away from home. I just wanted to get my parents attention. I was scatterbrained at 15. Reporter when her parents found the letter she left behind, they called the police. I was in shock. Why . Where . You know . How . Reporter she took a bus 30 miles to downtown seattle where she met an older girl at a youth shelter who introduced her to life on the streets. A pimp picked us up. Thats when i got raped for the first time. After it happened, he threw a towel at me and some carpet cleaner and told me to clean up the carpet because there was blood. Jimm reporter you were a virgin . Yeah. Reporter this sent her down a path to led her to this man. She says he was kind to her, offered her a place to stay. I confided in him a little bit about how stressed out i was. Reporter soon the dynamic changed. He asked me if i had ever worked before. And then he told me that i wouldnt be on the streets. And then thats when back page came into play. Reporter what did he say to you about it . He said its safer. He said its easier not to get caught. Reporter and through ads titled well worth it, 150 an hour and it wont take long at all, she says she started earning 4 ,000 a weekend for sex and handing all the money over. He started getting physically abusive. He would sleep in the living room next to the front door so i couldnt leave. Reporter how often did you work . Every single day. Its simple. Asks you if youre 18 or older. A simple yes click was as far as that went. It tore our family apart. Reporter her father says he would spend his days driving around seattle. The dreams of her going to college dr. Reporter searching for his missing girl. He learned she might be working the streets. The idea alone pushed him to a breaking point. It ran through my point, what i was going to do, and how i was going to handle it when i found her. It wouldnt have been good for the pimp. I know that. Reporter later her parents found out she wasnt on the streets but being sold online. What was it like for you to realize what was going on with back page . When you here your 15yearold child is posting an ad for sex or for rape, in her case, and that shes getting 25 to 30 calls an hour, and youre thinking, okay, how many of these is she having to answer . I mean, how many times a day is my child being raped . Reporter right now u. S. Law protects back page from being held legally responsible for what users post on the site. Reporter if someone advertises a faulty motorcycle. Buyer shouldnt be able to sue back page for most posting the ad. Under the law theres no difference between back page posting the ad for that motorcycle or for the underage girl. Reporter back page says they put in place a multitiered system for screening ads. Theres a filter for key words and a user reported flagging system. In 2012 their attorney told us. Online exploitation exists and the best tools to fight it are ols online, and backpage. Com is currently one of the best tools to fight it. Age, 18. Reporter the Seattle PoliceDepartment Says they find underage girls listed on back page all the time, including natalie who they rescued on a hotel sting 108 days after she went missing. He says i know who you are, natalie. Instantly, i saw storms of cops outside. Reporter one of those cops, this man, detective bill guyer. I remember meeting the detective. Almost reminded me of my dad. Reporter he formed a special bond with natalie. He helped her through the trial. Hobson is sentenced to 26 years for the commercial sex abuse of a minor. I tell her and every other girl, id like to get them to the point where they cant wait to get on the stand and say thats the person that did it to me. Reporter theyve agreed to take us inside a back page sting. We want to post an ad and do it under escorts. Reporter this detective frequently goes undercover. Hes asked we not show his full face. I am 18 years of age or older. You just say i agree and continue. One click and youre three. Reporter were here to see what happens when you post a back page ad that suggestions an underage girl. This is for an 18yearold girl with the mention of a younger frenld. Ask about my younger friend. The ad is up and running. In minutes we have an ad advertising an underage girl. Weve gotten several phone calls, several texts. Another call. Reporter hey, beautiful, are you angel . Right then theres another one. It hasnt been up for a half hour. This is crazy. A full 24 hours later, were in a Seattle Hotel with the squad. Angels ad is up and running and is yet to be taken down by back page. Were using the fruits from what we planted yesterday. Reporter they brought in katie, an undercover cop who will pretend to be angel. This is our ad we posted 24 hours ago. Its still getting responses, and katie is writing back to see if theyll meet the underaged girl here for sex. She calls back a man who left a voice mail. She tells him hes 16 and the friend 15. Im going to come to the window. Okay. Im in the window on the very far end, kind of near the flag poles. Me and my friend are standing in the window. Well wave to you. Reporter the scenario is set up. He thinks hes coming up to meet a 15 and 16yearold girl for sex. Hes in a royal blue shirt with a fedora on. Stay here. Stay here. Its stop. Reporter he tried to bolt. Please, please. Just relax, relax. Relax. Put your hands behind your back. Police. Youre under arrest. These girls you were coming to see. How old were they . They said something. What did they say . They said they are 16. You know how old was that girl . 14, 15, 13. That doesnt bother you at all . I just thought they were just needing what . Needing in what . Going to play scrabble . I just wanted to make more friends. Reporter the man pled not to attempted commercial sex abuse of a minor. Back page stings are becoming common place across the country. They said they always cooperate with Law Enforcement investigations. For natalie and other girls suing the site, its not about catching clients but holding the man behind it accountable. Hes just as accountable as the man who sold her, in my mind. Reporter when we come back, see what he does when he track him down overseas. Of proof. Proof of less joint pain and clearer skin. This is my body of proof that i can fight Psoriatic Arthritis with humira. Humira works by targeting and helping to block a specific source of inflammation that contributes to both joint and skin symptoms. Its proven to help relieve pain, stop further joint damage, and clear skin in many adults. Humira is the number 1 prescribed biologic for Psoriatic Arthritis. Humira can lower your ability to fight infections, including tuberculosis. Serious, sometimes fatal infections and cancers, including lymphoma, have happened, as have blood, liver, and nervous system problems, serious allergic reactions, and new or worsening heart failure. Before treatment, get tested for tb. 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Possibly a good place to find the founder of backpage. Com. We realized that backpage. Com was sold to an unnamed Dutch Holding company. Did carl ferrer own any companies there . He seems to be running a few other escort sites from here, including one called cracker, available nearly everywhere but the united states. A lot of people are looking for this guy, including the u. S. Senate. Id like to call the ceo of back page, carl ferrer. Reporter in march after he failed to show up to testify in a hearing about online sex trafficking, the senate voted to charge him with contempt of congress. We hoped he would be her. It was a unanimous vote. We want to know how much money theyre making and what their policies and procedures are for screening ads. Reporter back page refused to disclose this information. But the senates investigators say they obtained Company Emails where moderators are told not to take down a post unless theyre very sure the person is underage. Another, emails that suggest back page was telling moderators to edit ads. Things had been edited out including the fact that a girl was underage. Im betting when we get all the financials, theyre not making much money selling motorcycles but making a lot of money selling children. Reporter back pages Corporate Group is projected to have a profit of 173 million. They will not say what percentage of this comes from the adult ads. Back page is fighting the charge climbing the senates request is a violation of the First Amendment because it seeks every bit of information relating to every editorial decision made during the past six years. Weve been trying to find the ceo, and weve also tested out what happens when you post an add using language that suggests an underage girl is involved. Were going to email back page to report the ad to see if they take it down. Now we wanted to find out what would happen if he email back page directly flagging the ad as underage. Im sending their email, abuse at backpage. Com a note. Im saying i went on a date with a girl in this ad. Im saying she told me shes 15. Well see if they take down the ad. It took eight hours for this. If you have information regarding the exploitation of a minor, please contact the National Center for missing and exploited children. They said even though they think it does not clearly advertise a girl that is under 18. They took it down. They banned the account. They did report the ad to the National Center. Would you be surprised to know it stayed up for 24 hours . I wouldnt. Reporter this has the general counsel. She says 73 of the reports from suspected underage trafficking involve a back page post. They maintain monitoring programs and theyre policing their site. It told nightline back page is online to fight human trafficking. I think thats a false statement. I dont think you can be in the business of providing basically an online bizarre for escort ads that including the purchase and sale of children for sex and say youre online to help fight the problem. Reporter with a long list of questions, our search for the back page ceo brings us right here. Carl ferrer has turned down several of our interview requests. We came to this hotel because we found out theres a conference that carl is scheduled to attend. It turns out hes an active member of the kclassified ad industry. Its a chance to share ideas. Reporter he attends a networking conference every year. It doesnt take long before we spot him. Carl ferrer . Yes. Reporter weve been looking for you. Im with abc news. We want to ask you a few questions. Law enforcement tells us that underage girls are trafficked on backpage. Com, your company. No comment. Reporter we saw a real life example last week. Please, im sorry. Reporter we spoke to a father who has a 15yearold girl. She was trafficked on back page. I am sorry. Reporter youre a father. What would you want to say to him . He wants to know why this is going on. We just need a few minutes of your time. Initially when he saw us he said hello, how are you . As soon as we brought up Law Enforcement and the underage trafficking of young girls, he said he didnt want to talk to us. Carl ferrer might not have answered our questions, but soon a dc judge may compel him to answer the u. S. Senates. Hes in amsterdam because he wants to avoid the bright light of attention we are placing on his company. I dont think amsterdam is far enough for him to go where are others like natalie and their family are hoping her lawsuit which claims back page knowingly edited content which enables prostitution succeeds. Back page is fighting the allegations in court. Whoever owns the Company Knows hes selling kids today. Hes just as accountable as the pimp that sold her in my mind. Reporter in a statement to a abc news backstage said while the experience of children is the solution does not lie in making Online Service providers responsible for millions of posts by third party users. Little comfort to those who lives are so deeply affected. Like natalie and her family and the detective. He calls me on my birthday every year. Reporter every year . Hes the god father of my little girl. Hes my hero. To me, he sayed my little girl and brought her home to me. Reporter today the two men who share a special bond are about to be reunited. Its been three years since they last saw each other. How you doing . Good to see you. Yeah. Been a while. Yeah. This is great. Shes going to be all right. Reporter this is not a fight they chose, but its one they say they are determined to win. For other little girls and their dreams. Theres nothing really that im not looking forward to. This special edition of nightline will be right back. Theres no one road out there. No one surface. 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