 The criminal investigation of 2008 led to further arrests and a major Russian mafia (the Tambov Gang) money laundering scheme be revealed.According to the Bulgarian prosecutor more than one billion euros (1.4 billion dollars) of dirty Russian money had been laundered through a series of financial transactions in Bulgaria and Estonia.The laundered money was, according to allegations, part of the notorious St Petersburg Tambov gang's proceeds from drug trafficking, prostitution and protection rackets.