2,578 interviews
Robert Mueller's investigators spoke to 500 witnesses, all of whom could have been charged with lying to the FBI. They ranged from top level figures like Paul Manafort, Don McGahn and Michael Cohen to obscure personalities like George Papadopoulos - and people are the very heat of Trump's inner circle, including Hope Hicks, his former communications director who had worked for him even before he ran for president.
$25 millionIt cost U.S. taxpayers $25 million to fund the Mueller investigation as of February, and it was wrapped up by the end of March, meaning the cost is expected to be slightly above that figure.
675 daysMueller was appointed to begin investigating Trump and his campaign's possible collusion with Russia on May 27, 2017. He handed over his completed report on the investigation to Attorney General Bill Barr on March 22, 2019.
33 indictmentsOf the indictments that came out of the probe, 25 were Russian nationals and three were Russian entities.
The other five were Konstantin Klimnik, a former employee of Paul Manafort; Bijan Kian and Ekim Alptekin, both Michael Flynn's business partners; Roger Stone, former Trump campaign official; and Greg Craig, who served for a period as former President Barack Obama's White House counsel.
22 guilty pleas (many from Paul Manafort)Eight of the pleas came from Trump's former attorney, who cooperated with Mueller's investigation, Michael Cohen. Another 8 came from Paul Manafort for bank and tax fraud.
The rest are individual pleas from Michael Flynn, George Papadopoulos (left), Rick Gates, Richard Pinedo, Alex Van Der Zwaan, and W. Samuel Patten.
One 'golden showers' dossier
The dossier drawn up by ex-British spy Christopher Steele detailed claims of degrading sex acts in Moscow which Trump