With an aggressive style that stood out in the staid world of Austrian banking even more than her bouffant red wig, Sonja Kohn made few friends gathering billions for Bernard L. Madoff from wealthy investors in Russia and across Europe.
Now, she has even fewer.
Mrs. Kohn has dropped out of sight, leaving the firm she founded, Bank Medici, in the hands of Austrian regulators, who took it over last week.
Embarrassment from investing heavily with Mr. Madoff could explain wanting to disappear from public view. But another theory widely repeated by those who know Mrs. Kohn is that she may be afraid of some particularly displeased investors: Russian oligarchs whose money made up a chunk of the $2.1 billion that Bank Medici invested with Mr. Madoff.
“With Russian oligarchs as clients,” said a Viennese banker who knew Mrs. Kohn and her husband socially, “she might have reason to be afraid.” It was a view shared in interviews with Mrs. Kohn’s fellow bankers, former employees and other associates — from Vienna to London to Geneva to Monsey, N.Y. Few of those who know her were willing to be quoted by name because they feared being linked to the scandal surrounding Mr. Madoff as well as the investigations into his alleged fraud.
But several people with knowledge of her personal and professional dealings say she became concerned about retribution by Russian investors after Mr. Madoff’s arrest last month. (Russia’s richest men have been especially strapped as commodity prices and their stock market have collapsed.) A spokeswoman for Bank Medici, Nicole Back-Knäpp of the public relations firm Ecker & Partner in Vienna, said Mrs. Kohn did not want to speak to the press.
“She is a victim and the Bank Medici as well,” Ms. Back-Knäpp said. She declined to comment on whether Mrs. Kohn was in hiding.