Dateline: Collateral Damage | The women of DOS had to provide “collateral”… The full story from former NXIVM insiders tonight on an all-new Dateline at 9/8c. | By Dateline NBC | In the fall of 2016, India Oxenberg joined her close friends Danielle Roberts, Nicki Clyne, and Allison Mack near Albany, New York. Each devotees of "Vanguard" Keith Raniere. No one knew outside NXIVM's inner circle, but India was there because she had been inducted into a secret sorority. When we were told about this women's group, we were told that it was exclusively women mentoring women and that there were no men involved. Mentoring? We're told it was entirely-- Mentoring each other? Helping each other? Yes. It was supposed to be about, like, executive coaching, but for women. And to me, that sounded great. I thought, like, "Well, I can use -- I can use help. I can use some guidance." This women's group had an odd-sounding name: DOS. And Allison was the leader. Were you asked to join DOS by Allison Mack? She recruited me. Who brought you in? You know, Allison had invited me. Allison Mack? Uh-huh. And at the time where I was at in my life, it was something that I really thought would help me. But first, the women had to prove their loyalty. They had to sign a document requiring members to provide what was called collateral. Some would call it potential blackmail… What was the collateral that you had to give? So, the collateral was damaging or compromising information about yourself or your loved ones. India says the collateral included graphic sexual images of the women. But that wasn't all. Really, a majority of it was made up information. The collateral became increasingly more stressful and difficult because we had to make up things about people that we cared about and -- and people who we loved. Did you make up things about your family? I did. And -- and that was something that was so horrible for me because I knew that I would never break the secret because I would never wanna hurt the people that I loved most.