Sudipta Sen, the man whose chit fund went bust earlier this month, wiping out the savings of lakhs of depositors in West Bengal, is being escorted by the police to Kolkata from Kashmir, where he was tracked down yesterday. Mr Sen has reportedly sent an 18-page letter to the CBI describing his close links with two Trinamool MPs Srinjoy Bose and Kunal Ghosh. He has reportedly also alleged that he was blackmailed by the MPs. Many members of the Trinamool are urging party chief and Chief Minister Mamata Banerjee to ask for the resignation of Mr Ghosh, who headed the Saradha Group's media interests.