Just before his death , Aleksander Mikhailov received threats from a high-ranking FSB general , Grigory Pasko , according to Sergei Yushenkov . Shortly before his death , according to Sergei Yushenkov , Aleksander Mikhailov received threats from a high-ranking FSB - General , Grigory Pasko . Shortly before his death , according to Grigory Pasko , Sergei Yushenkov received threats from a high-ranking FSB - General , Aleksander Mikhailov .