The battle at Writers' Building
Bengal Volunteers targeted Col NS Simpson,The Inspector General of Prisons, who was infamous for the brutal oppression on the prisoners in the jails. The revolutionaries decided not only to murder him, but also to strike a terror in the British official circles by launching an attack on the Secretariat Building - the Writers' Building in the Dalhousie square in Kolkata.
On 8 December 1930, Badal along with Dinesh chandra Gupta and Benoy, dressed in European costume, entered theWriters' Building and shot dead Simpson. Badal Gupta was also influenced by the revolutionary activities of his two paternal uncles Late Dharani Nath Gupta and Nagendra Nath Gupta who were victims of famous Alipore Bomb Case and were imprisoned along with Rishi Aurobindo Ghosh.
British police started firing. What ensued was a brief gunfight between the 3 young revolutionaries and the police. Some other officers like Twynam, Prentice and Nelson suffered injuries during the shooting.