According to sources, US authorities are investigating Barry Silbert's crypto empire's finances.
Brooklyn federal prosecutors are investigating Digital Currency Group Inc. transfers.
The unnamed persons mentioned a troubled subsidiary that offers crypto loan services.
Investors' information regarding those transactions is also being investigated.
One person claimed prosecutors are wanting interviews and papers. Another person indicated the SEC is investigating.
Silbert, Digital Currency Group, and its companies haven't been charged yet.
One source indicated the criminal investigations into Silbert's enterprise began before FTX's collapse.