Kolkata, July 26 :
Sarkar alias Nitu was grilled over two sessions in the morning and the afternoon at the Central Bureau of Investigation (CBI) office at Salt Lake.
He was earlier served summons to appear for questioning at the CBI office.
Scam mastermind Sudipto Sen had claimed in a letter to the CBI in April 2013, that he had paid money to Sarkar and his accomplices since 2010 to cover up a probe then being conducted by market regulator Securities and Exchange Board of India (SEBI) into his business dealings.
Sarkar told media persons that he gave some papers asked for by the CBI sleuths.