LONDON (AP) — The Moscow lawyer said to have promised Donald Trump's presidential campaign dirt on his Democratic opponent worked more closely with senior Russian government officials than she previously let on, according to documents reviewed by The Associated Press.

Scores of emails, transcripts and legal documents paint a portrait of Natalia Veselnitskaya as a well-connected attorney who served as a ghostwriter for top Russian government lawyers and received assistance from senior Interior Ministry personnel in a case involving a key client.

The data was obtained through Russian opposition figure Mikhail Khodorkovsky's London-based investigative unit, the Dossier Center, that is compiling profiles of Russians it accuses of benefiting from corruption.

The AP was unable to reach Veselnitskaya for comment. Messages from a reporter sent to her phone were marked as "read" but were not returned.

Veselnitskaya has been under scrutiny since it emerged last year that Trump's eldest son, Donald Jr., met with her in June 2016 after being told by an intermediary that she represented the Russian government and was offering Moscow's help defeating rival presidential candidate Hillary Clinton.

Veselnitskaya has denied acting on behalf of Russian officialdom when she met with the Trump team, telling Congress that she operates "independently of any government bodies."

But the Dossier Center's documents suggest her ties to Russian authorities are close — and they pull the curtain back on her campaign to overturn the sanctions imposed by the U.S. on Russian officials.