The CBI probing the multi-crore 2G Spectrum scam, is continuously grilling former telecom Minister A Raja and Shahid Balwa, DB Realty managing director and promoter of Swan Telecom Limited.AIR correspondent quoting CBI sources reports the agency has got some specific leads in the case. The CBI yesterday confronted both Raja and Shahid Usman Balwa with documents relating to the scam. Both of them who are in CBI custody till Monday were questioned together on licenses allotted to the companies by showing favours. The CBI has focused to establish the money trail in the 2G Spectrum scam. The Enforcement Directorate which is also investigating the scam, has established the flow of over 206 crore rupees from DB Realty to Kalaignar TV. DB Realty, however, has claimed that Balwa, the Managing Director of the company, ha been falsely implicated in the scam.