As special counsel Robert Mueller concluded his Russia investigation, here is a look at the key names who are likely to feature in the report.

– Paul Manafort

The former campaign chairman of Donald Trump’s campaign has been convicted in Washington and Virginia of crimes related to years of Ukrainian political consulting work, including allegations he concealed his foreign government work from the United States and failed to pay taxes on it. Though the charges do not directly touch Mr Trump, he nonetheless remained a figure of considerable intrigue and enjoys the continued sympathy of the President, who has left open the door for a pardon. He is now serving a more than seven-year prison sentence.

– Michael Flynn

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President Donald Trump’s former national security adviser Michael Flynn is awaiting sentencing (Carolyn Kaster/AP)

Mr Trump’s former national security adviser pleaded guilty to lying to the FBI just days after Mr Trump took office by telling agents that he had never discussed sanctions with the-then Russian ambassador to the United States. The White House said Flynn had misled administration officials, including Vice President Mike Pence, about the conversation and ousted him weeks later. He has since become a vital cooperator for Mr Mueller, having met 19 times with investigators. Prosecutors are not recommending any prison time when he is sentenced next week.

– Michael Cohen

Mr Trump’s long-time lawyer and fixer is at the centre of not only Mr Mueller’s investigation but also a separate, and rapidly mushrooming, investigation into hush-money payments. In Mr Mueller’s investigation, Cohen has admitted lying to Congress about a proposed real estate development in Moscow. He told lawmakers the negotiations were done in January 2016 when in fact they stretched deep into the campaign. He also pleaded guilty in New York to campaign finance violations stemming from the payments, with prosecutors saying last week that he “acted in coordination and at the direction of Individual 1” — or Mr Trump.

– George Papadopoulos

The former Trump campaign foreign policy adviser served a 14-day prison sentence after admitting lying to the FBI about a 2016 conversation with a Maltese professor who told him that Russia had “dirt” on Hillary Clinton in the form of stolen emails. Information about Papadopoulos’s contacts during the campaign started the FBI’s Russia investigation.

– Russian intelligence

Twelve Russian military intelligence officers were charged in July with hacking into email accounts of Hillary Clinton’s presidential campaign and the Democratic Party and then facilitating the release of tens of thousands of private communications. It remains perhaps the most direct example of what intelligence officials say was a broad conspiracy by the Kremlin to meddle in the 2016 election on Mr Trump’s behalf.

– Russian online trolls

A separate indictment charges 13 Russians with funding a covert social media propaganda campaign to sow discord among Americans in the run-up to the 2016 presidential election. Prosecutors say the scheme was run by a Russia-based troll farm that used bogus social media postings and advertisements fraudulently purchased in the name of Americans to try to influence the race.

– Roger Stone

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Roger Stone, an associate of President Donald Trump, is facing charges (Cliff Owen/AP)

A long-time Trump confidant, and self-proclaimed “dirty trickster” of Republican politics, Stone is charged with witness tampering and lying to Congress about his efforts to gain advance knowledge of WikiLeaks’s plans to release damaging information on Mrs Clinton during 2016. Though a Stone tweet from 2016 — “Trust me, it will soon the Podesta’s time in the barrel” — appeared to presage the disclosure of hacked emails, Stone has said he had no inside knowledge about the content, source or timing of WikiLeaks’s disclosure. He has also pleaded not guilty to the federal charges brought by Mr Mueller.

– Julian Assange

The WikiLeaks founder, under Justice Department scrutiny for years for the group’s role in publishing government secrets, has been an important figure in the Mueller investigation as investigators examine how WikiLeaks obtained emails stolen from Mrs Clinton’s campaign and Democratic groups. Prosecutors have also investigated whether any Americans were involved in coordinating that effort. Separately, prosecutors in the Eastern District of Virginia inadvertently disclosed the existence of a sealed criminal complaint against the WikiLeaks founder, though no details have been publicly announced.

– Donald Trump Jr

The president’s eldest son has attracted scrutiny for his role in arranging a Trump Tower meeting in June 2016 — also attended by Manafort and Mr Trump’s son-in-law Jared Kushner — at which he expected to receive damaging information on Mrs Clinton. He has said the meeting was a waste of time because he did not receive anything interesting from the attorney, Natalia Veselnitskaya. Both he and his father have suggested that anyone in that position would have taken such a meeting in hopes of getting dirt on a political opponent.