"The criminal probe against Vinnik has begun. In accordance with the Greek legislation, a preliminary investigation will take place, followed by a decision whether a criminal case should be initiated," Musatov said.
According to the lawyer, two investigators of the Greek financial police arrived on Wednesday at the Diavata prison in Thessaloniki and announced that Vinnik will be questioned in connection with the start of the criminal proceedings against him.
Vinnik was detained in Greece in July 2017 at the request of the US authorities on various charges, including laundering $4 billion through bitcoin cryptocurrency exchange BTC-E, which was allegedly headed by Vinnik. The exchange has said that the Russian national had never been engaged in its activities. The suspect himself has denied the US accusations.
Vinnik is also wanted for separate fraud and money-laundering charges in Russia and France.