Lance Williams departs from the Chronicle, on the heels of Seth Rosenfeld, Susan Sward, and -- is that Chuck Finnie?​When it was announced last week that Lance Williams, the last man standing at the San Francisco Chronicle's investigative division, had resigned from the paper, you didn't need to be an investigative journalist to know that the Chron wasn't going to start filling its pages with ads seeking the next big-name member of its I-team.The notion of reporters meticulously sifting throu