"Keith Raniere, the leader of an elusive US self-help group, has been arrested by the FBI in Mexico and charged with sex trafficking.
Federal prosecutors allege Mr Raniere oversaw a "slave and master" system in his group called Nxivm, where female members were expected to have sex with him and were branded with his initials.
He is expected to appear in court on the charges in
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"Cults," Sects, and "New Religious Movements"