David Letterman is “a master at manipulating audiences,” and he’s not telling the whole story of the alleged extortion plot by Robert Halderman, says Halderman’s attorney. Gerald Shargel did the talk-show circuit this morning, E! reports, and he pointed out to Today that, “in the history of extortion attempts, there's never been, as far as I know, someone paying by check” as Letterman claims to have done. (More David Letterman stories.)