The undergoing Stuttgart investigation upon money laundry operations for a Russian mob clan could lead to Russian millionaire Oleg Deripaska writes the German publication Der Spiegel.

The accusation relates to the oligarch’s interference with an organized crime group that according to investigations might have eliminated some of his competitors at his order.

According to Der Spiegel, the investigation focuses on the laundering of some 8 million euro in real estate transactions in Stuttgart. The deals date from the 1990’s when with the fall of the Soviet Union, an unprecedented fight ignited over the national patrimony. According to Stuttgart officials, Deripaska has strong relations with the Russian mob ever since.

Authorities say that the collaboration has lead to judges being bribed and murders ordered. Deripaska denies the allegations.