NewsX: BIG blow to the Central Bureau of Investigation. If recent Supreme Court's observations on CBI being Govt's puppet weren't enough, now there are charges of GRAFT in the premier investigation agency.br br CBI's vigilance units has arrested its own Supeintendent Vivek Dutt for allegedly accepting a bribe of 7 lakh from a businessman. Significantly, Vivek Dutt was the chief investigating officer in the coalgate probe, but the CBI has clarified that the bribe was not related to this case.