Two recently de-classified Intelligence Bureau files reveal that former Prime Minister Jawaharlal Nehru spied on the family of freedom fighter Netaji Subhash Chandra Bose for two decades from 1948 to 1968. Nehru died on May 27, 1964 and spying continued for four years even after his death. The files show that Intelligence Bureau which came directly under Nehru carried the espionage activities, says an India Today report. Nehru was the Prime Ministers for 16 of those years.