A Russian lawyer says she was asked for damaging information on Hillary Clinton during last year's presidential campaign.
The lawyer, Natalia Veselnitskaya, told NBC News she received a phone call from an unknown man and was told to meet with Donald Trump Jr at Trump Tower.
In the interview, Ms Veselnitskaya suggested she didn't initiate the meeting.
She said she was lobbying against US sanctions affecting Moscow, but wasn't acting on behalf of the Kremlin, and didn't have information on the Clinton campaign, and had never worked for the Russian government.
"I never had any damaging or sensitive information about Hillary Clinton," Natalia Veselnitskaya told NBC News.
"It was never my intention to have that. All I knew was that Donald Trump Jr. was willing to meet with me."
On Ms Clinton, she said it was "quite possible that maybe they were looking for information. They wanted it so badly."
She said she did not know why Mr Trump Jr believed she was planning to offer damaging information about Clinton, saying she only knew he was willing to meet with her.
The New York Times reported that Mr Trump Jr was told in an email before the meeting that the lawyer's offer of potentially damaging information was part of a Russian government plan to aid his father's presidential campaign.
The interview is Ms Veselnitskaya's first public comment since Donald Trump Jr acknowledged that he made time for the meeting, hoping to get information on Ms Clinton, his father's Democratic presidential opponent.
The president's son said the meeting was arranged by a contact he knew through the 2013 Miss Universe pageant Mr Trump held in Moscow.
Following the news, Mr Trump Jr tweeted: "Obviously I'm the first person on a campaign to ever take a meeting to hear info about an opponent ... went nowhere but had to listen."