James J. McDermott Jr., former chairman and chief executive officer of the boutique brokerage Keefe, Bruyette & Woods Inc., was charged Tuesday by Federal authorities with leaking inside information about banks to a pornography star.

The 48-year-old Mr. McDermott, who abruptly left Keefe in June after working at the New York company 20 years, had an "intimate affair" with Kathryn Gannon and leaked information to her from at least June 1997 through April 1998, according to court papers.

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