In the 2G case files lies a mystery — of a driver, a “stolen vehicle with Rs 4 crore cash” and a private detective hired to keep tab and gather evidence. In its supplementary chargesheet, the CBI claims Rs 190 crore was transferred from Cineyug Films to Kalaignar TV in Chennai between January 28 and August 7 in 2009. A Tavera, the CBI says, was used to carry 23 boxes from Anna Arivalayam, headquarters of the DMK and Kalaignar TV office, to a building in nearby Taylors Road. The agency says the Tavera was hired by Greenhouse Promoters to ferry officials of DB Realty Ltd.