A grand jury also has indicted Konstantin Kilimnik, a political operative who sometimes served as an intermediary between Manafort and Deripaska. In court filings, Mueller’s prosecutors have said Kilimnik has ties to Russian spy agencies, which Kilimnik denies.
The affidavit unsealed on Wednesday also disclosed that Deripaska had financially backed Manafort’s consulting work in Ukraine when it started in 2005-06, citing information from a source whose name was redacted, a sign that a former Manafort associate may have cooperated with the investigation.
On Tuesday, a federal judge in Virginia dealt a blow to Manafort by rejecting a motion to dismiss the case on the argument that Mueller did not have the mandate to prosecute him.
Manafort, who was Trump’s campaign manager during part of his 2016 presidential campaign, has been indicted in Washington and Virginia on charges including conspiring to launder money, bank and tax fraud and failing to register as a foreign agent for the pro-Russia Ukraine government.
Manafort has pleaded not guilty. His Virginia trial starts in July and his Washington trial is scheduled for September.