Mack, best known for her role onas Clark Kent’s tech-savvy friend Chloe Sullivan, was allegedly involved in an organization called NXIVM, a group that operated under the guise of being a female mentorship program, created and led by, also known as “Vanguard.” “The victims were then exploited, both sexually and for their labor, to the defendants’ benefit," United States attorney Richard P. Donoghue said in a statement. Raniere has been in custody since he was arrested in Mexico in March.