In 1930 he attracted to the linearmed revolution led by MasterdaSurya Sen in Chittagong region. Since Dutta was a school friend of veteran activist Ananta Singh he joined in revolutionary action group with Singh's guidance. Mainly he took charge to keep the arms, bomb in safe custody hiding from the eye of police intelligence. In the meanwhile one sub-inspector of Intelligence Branch, Prafulla Chakrabarty caught Ananta Singha and causes repeated disturbance of the works of revolutionary group. Dutta with intention to take revenge, befriended with Prafulla and on 24 May 1924 he met that inspector in Chittagong Paltan Field and killed him by a Revolver.
Dutta was again arrested in No. 1 Bengal Ordinance Act and sent behind the bars. In the prison, he suffered from mental and psychological disorder due to negligence and torture by the jail authority. For treatment, the government sent him to Ranchi.