Ukrainian prosecutors found no evidence of wrongdoing by Hunter Biden after an audit of thousands of old case files.

Hunter Biden served on the board of a Ukrainian gas company, Burisma Holdings, from 2014 to 2019, including time when his father, Joe Biden, was vice president and leading U.S. policy toward Ukraine. The elder Biden had threatened to withhold $1 billion in aid if Ukraine’s leaders did not fire the country’s top prosecutor, who was widely seen as corrupt.