The leader of the NXIVM sex cult was convicted of sex trafficking. In the same trial he was convicted on a false charge of CP possession based the contents of a hard drive that was altered by an unknown person for an unknown reason while it was in the FBI's possession, according to sworn cross-examination testimony. Clearly a kangaroo court.
Addendum: both parties to this interview demonstrate that NXIVM doesn't fit the criteria for a cult. Clyne claims members aren't isolated from the real world or prevented from quitting -- many have quit and not come back.