NEW: In Dec 2015 as Felix Sater pursued Trump Tower Moscow discussions he represented a mystery owner in the sale of a NYC office building along with accountant Ilya Bykov who (per @guardian story) is linked to Russian billionaire Aras Agalarov - my latesthttps://t.co/pADW4Kg3B7

— Wendy Siegelman (@WendySiegelman) October 22, 2018