President Barack Obama’s former White House counsel Kathryn Ruemmler said Wednesday in testimony to Congress that it “was a mistake to deal with” Jeffrey Epstein but insisted she never witnessed criminal activities.

“I can see now that he used me and other respectable people to legitimize his standing,” Ruemmler, the former top lawyer at Goldman Sachs, told members of the House Oversight Committee, according to a copy of her opening remarks.

Ruemmler is the latest prominent figure called before the House Oversight Committee as lawmakers investigate the network of powerful people connected with Epstein. The bipartisan inquiry has already included testimony from more than a dozen high-profile witnesses, including Microsoft co-founder Bill Gates and former President Bill Clinton, as lawmakers examine how Epstein’s wealth and influence may have helped shield him from scrutiny.

Ruemmler served as White House counsel under Obama from 2011 to 2014 and was briefly considered for attorney general. She served as Goldman Sachs’ general counsel for the past six years before announcing in February that she would step down amid backlash over her correspondence with Epstein.

Although she said she would step down on June 30, she remains employed by Goldman Sachs.

Entering Wednesday’s hearing, Rep. Robert Garcia of California, the top Democrat on the committee, told reporters that Ruemmler will provide unique insight as one of the few people who was “very close in the last phase of Jeffrey Epstein’s life.”

“I think some of the emails that are in the files are very concerning about how she communicated with Jeffrey Epstein,” he added.

The two were close years after Epstein’s 2008 conviction on sex crimes

While Ruemmler has tried to downplay their relationship in more recent statements, thousands of documents released by the Justice Department showed that Ruemmler and Epstein had an extensive relationship. The files included personal emails, social plans and gifts that extended beyond formal legal work. Documents showed she had called Epstein “Uncle Jeffrey” in emails and said she adored him.

Ruemmler said in her opening remarks that she first met Epstein in 2014 regarding potentially working with him and Gates “to set up a large donor advised fund.” Soon after, according to Ruemmler, she learned about Epstein’s 2008 conviction on sex crimes, when he became a registered sex offender.

She said Epstein expressed remorse about it, and that he did not know the women were underaged. She said she “relied on the resolution reached by federal and state prosecutors and validated by a judge as being a proportionate and final resolution of his criminal conduct.”

House Oversight Chair James Comer told reporters Wednesday that the “most concerning” part of Ruemmler’s communications with Epstein is how she “tried to rehabilitate his image after he was convicted of solicitation of a minor.”

Ruemmler’s interview is part of a broader investigation

Comer said Wednesday that Ruemmler is the 18th person to testify as part of their broader investigation.

Billionaire investor Leon Black was subpoenaed last month after lawmakers said he refused to answer some questions about his yearslong relationship with Epstein.

Comer said Wednesday that Black will appear for a formal deposition on Sept. 3 but that he expects to have Black’s nondisclosure agreements by “the end of the week.”

The committee has also expressed interest in questioning acting Attorney General Todd Blanche, whose nomination to permanently lead the Justice Department is pending before the Senate. Former Attorney General Pam Bondi identified Blanche as the department’s point person on the release of the Epstein documents, a process that has drawn bipartisan scrutiny.

“Hopefully Blanche will come in as soon as his confirmation is over,” Comer said.