Breaking a year of public silence, special counsel Robert Mueller defended his investigation in an op-ed published Saturday in the Washington Post. Mueller’s piece ran a day after President Donald Trump commuted the three-year prison sentence of Roger Stone, his longtime adviser. In announcing the move, the White House asserted that Stone, who Mueller’s office prosecuted last year, “is a victim of the Russia Hoax that the Left and its allies in the media perpetuated for years in an attempt to undermine the Trump Presidency.” “The work of the special counsel’s office—its report, indictments, guilty pleas and convictions—should speak for itself,” Mueller wrote.