A New York woman was arrested Wednesday in connection with running a sex trafficking ring that brought women from outside the U.S. to work in her brothels in Boston, the Massachusetts U.S. Attorney's Office announced. On June 24, a federal grand jury in Boston indicted 40-year-old Zengzeng "Bella" Liu, of Flushing, on one count of knowingly persuading an individual to travel in interstate commerce to engage in prostitution, federal prosecutors said in a Thursday press release.