Irakly Ike Kaveladze. Photograph: Twitter
The meeting brought together Donald Jr and two other senior campaign aides with Natalia Veselnitskaya,
a Russian lawyer with ties to the Kremlin, and Rinat Akhmetshin, a Russian American political operative and former military officer.
Kaveladze was in 2000
named by the New York Times as responsible for using about 2,000 shell companies in the US to launder $1.4bn from Russia and eastern Europe into accounts at Citibank and the Commercial Bank of San Francisco.
report by the US Government Accountability Office (GAO) on the alleged scheme did not identify Kaveladze by name but confirmed the involvement of his company, International Business Creations. It is possible that these transfers were used to launder money, the report said of the transactions.
Kaveladze and Balber, his attorney, did not respond to questions on Tuesday about his alleged involvement in money laundering. Charles Young, a spokesman for the GAO, said he could not independently confirm reports of Kaveladzes involvement.
Disclosures about the Trump Tower meeting have intensified concerns over what US intelligence services say was a concerted campaign by
Russia to sway the 2016 election. Emails released by Trump Jr last week gave the first confirmation that the campaign at least tried to collude with that effort.
In the days before the meeting, Donald Jr sent an email eagerly welcoming the offer of damaging information on Clinton, which was described as part of Russia and its governments support for Mr Trump by a go-between operating on behalf of Agalarov, the Russian real estate tycoon.
That go-between was Rob Goldstone,
a British music publicist who represents Agalarovs son Emin, a well-known pop singer in Russia. Goldstone, Kaveladze, Akhmetshin, Veselnitskaya and a translator were joined by Trump Jr; the then Trump campaign chairman, Paul Manafort; and Jared Kushner, Trumps son-in-law and adviser.
All are likely to come under the scrutiny of simultaneous inquiries into the Russian campaign that are being conducted by two congressional committees and Robert Mueller, a former FBI director who is serving as a special counsel on the subject. Kushner, now a senior White House official, originally
failed to note the meeting in paperwork submitted when he took his government job, which was illegal.
Donald Trump Sr and his supporters have
tried to paint the meeting as an unremarkable attempt to glean some useful opposition research for the rough-and-tumble of national politics.
Numerous veterans of presidential campaigns for both parties reject this, insisting that the appropriate response would have been for the Trump team to report the Russians to the FBI.
Akhmetshin, the Russian American political operative,
has said Veselnitskaya, the Russian attorney, gave the Trump campaign aides a plastic sheath of documents during the meeting, calling into question claims by Trump Jr that she offered no meaningful information and that the meeting concerned Russias ban on children being adopted by Americans. Sign up for the Minute email. Catch up on todays US politics news in 60 seconds