Source: https://www.state.gov/actions-to-counter-wagner-and-degrade-russias-war-efforts-in-ukraine/
THE PLAYERS
RUSSIAN GOVERNMENT OFFICIALS
Head of SIZO-99/1 of the Federal Penitentiary Service of Russia (“Matrosskaya Tishina”) (as of 2009). He agreed to the transfer of the auditor Sergei Magnitsky from SIZO-99/1 (Matrosskaya Tishina) to the Butyrka prison, where he died
PROKOPENKO, Ivan Pavlovitch; DOB 28 Sep 1973; POB Vinnitsa, Ukraine (individual) [MAGNIT]. -to- PROKOPENKO, Ivan Pavlovitch (Cyrillic: ПРОКОПЕНКО, Иван Павлович), Tula Region, Russia; DOB 28 Sep 1973; POB Vinnitsa, Ukraine; nationality Russia; alt. nationality Ukraine; citizen Russia; alt. citizen Ukraine; Gender Male; Tax ID No. 773407989940 (Russia) (individual) [MAGNIT] [RUSSIA-EO14024].