Nehru spied Subhash Chandra Bose family for two decades

Apart from allegedly intercepting and copying letters written by Bose's family members, the agency sleuths shadowed them on their domestic and foreign travels. The agency seemed especially keen to know to whom Bose's family met and their discussion. The files show the IB resumed British-era surveillance on the two Bose family homes in Calcutta: 1 Woodburn Park and 38/2 Elgin Road.