NXIVM founder Keith Raniere is speaking out in a rare interview. In what NBC News is calling Raniere's "first interview since his arrest" in March 2018, the leader of a group that federal prosecutors said enlisted "sex slaves" will appear alongside investigative journalist Frank Parlato (who is facing his own legal troubles) in a Dateline interview that was partially shown onNBC Nightly News With Lester Holton Friday.