Just before last year’s state elections in West Bengal, news channels beamed a set of videotapes showing ruling TMC’s top leaders allegedly accepting bribes. Mathew Samuel, a former Tehelka editor and founder-CEO of Narada.com, who conducted the sting operation, has since found himself having to answer uncomfortable questions, including who provided the cash that he distributed. In this interview to Outlook, just after the investigation was handed over to the CBI, he reveals the details.