(FILES) In this file photo taken on June 19, 2013, then FBI Director Robert Mueller testifies before the US Senate Judiciary Committee on oversight during a hearing on Capitol Hill in Washington, DC. - Special Counsel Robert Mueller will make a statement on May 29, 2019, on the investigation into Russian interference in the 2016 Presidential election, according to a statement from the US Department of Justice. (Photo by Saul LOEB / AFP)