US, UK and Austrian prosecutors are investigating former Austrian fund manager Sonja Kohn, chair of Austria's Bank Medici, they believe was paid more than $40M in kickbacks to funnel billions of dollars to Madoff via separate companies she controlled, according to affidavits reviewed by The WSJ. Ms. Kohn apparently turned three Bank Medici funds into "feeder funds" that supplied Madoff with an estimated $3.5B from European investors. Kohn, a 60-year-old Viennese former Wall Street penny-stock broker, has repeatedly denied prior knowledge of Madoff's fraud or any wrongdoing. According to an April affidavit from DOJ filed with Vienna prosecutors, Kohn is...