The SIG was set up by the National Front government to probe sensitive cases like Bofors, HDW, Airbus, phone-tapping and Chandraswami’s letter-forgery case. The St Kitts probe came to a virtual halt with N.K. Singh’s removal. Why was he removed? "Partly because of the phone-tapping case, in which Chandra Shekhar could not back up his charges, but mainly because of St Kitts, where I had registered the FIR and was very close to fil-ing the chargesheets. Had I been allowed to do so, things may have been very different,’’ says Singh, who served two tenures in the CBI, first from 1972 to 1980 when he investigated the Kissa Kursi Ka Case, and later for about a year beginning 1990.