Natalia Vladimirovna Veselnitskaya is a Russian lawyer. Her clients include Pyotr Katsyv, an official in the state-owned Russian Railways, and his son Denis Katsyv, whom she defended against a money laundering charge in New York. On 8 January 2019, Veselnitskaya was indicted in the United States with obstruction of justice charges for allegedly having attempted to thwart the Justice Department investigation into the money laundering charges against Katsyv.

Sergei Leonidovich Magnitsky was a Russian lawyer and tax advisor responsible for exposing corruption and misconduct by Russian government officials while representing client Hermitage Capital Management. His arrest in 2008 and subsequent death after eleven months in police custody generated international attention and triggered both official and unofficial inquiries into allegations of fraud, theft and human rights violations in Russia. His posthumous trial was the first in the Russian Federation.