Spencer Kuvin, June 6 -- She flew the planes. She kept the schedules. She wrote, in a 2010 email obtained through civil litigation, that she would always stand up for Jeffrey Epstein in press or in court. Now, nearly seven years after Epstein's death in a Manhattan federal jail, Nadia Marcinko is being described by a prominent survivor attorney as one of the most important unresolved figures in the entire investigation - a woman who, he argues, could still unlock names that official inquiries have not reached.

one involving a former British royal, the other a football club chairman - in a convergence that illustrated how far the scandal's gravitational pull now extends.

Marcinko's position within the Epstein orbit was unusual by any mea...