On the fourth day of the nine-day remand of the Rose Valley group chairman Goutam Kundu, CBI DIG S Bagchi personally interrogated Kundu.
According to sources, Bagchi questioned Kundu about his possible political links to run his business.
On Monday, the Special CBI Court here had allowed the Central investigating agency to take Kundu on a nine-day remand for interrogation.
The CBI brought Kundu from Kolkata on transit remand on Sunday.
The CBI had filed a preliminary chargesheet against Kundu and three top executives of Rose Valley Group, managing director Sibamaya Datta and two directors Ashok Kumar Saha and Ram lal Goswami, on January 7 this year for allegedly cheating thousands of gullible investors of their hard earned money after promising high returns on their deposits.
The company had allegedly duped investors to the tune of nearly `17,000 crore across India.
The company was active in Odisha with 28 branches in almost every district and duped investors of about `500 crore.