In August, his eighth book, “True Crimes and Misdemeanors: The Investigation of Donald Trump,” about Robert Mueller’s inquiry into election meddling, was published, getting positive reviews and a brief berth on the New York Times best-seller list. Then in a matter of minutes, Mr. Toobin, 60, committed the act that would make him subject, not observer, of scandal, investigation and commentary. While working on a podcast about the presidential election for WNYC and The New Yorker with some of the magazine’s other well-known journalists, including Jane Mayer and Masha Gessen, he was seen lowering and raising his computer camera, exposing and touching his penis, and motioning an air kiss to someone other than his colleagues, Mx. 