But one man who was a key player in both cases — and identified by the government as a co-conspirator at the trial of Mr. Skelos, the former Republican majority leader of the State Senate, and his son, Adam — never appeared in the courtroom.
That man was Leonard Litwin, the 101-year-old owner of Glenwood Management, an influential developer of luxury high-rise apartment buildings in Manhattan that is among the state’s most prodigious political donors. Prosecutors named Mr. Litwin as a co-conspirator during a sidebar conference with the judge and defense lawyers that went largely unnoticed.