Dr. Roy was elected to the All India Congress Committee in 1928. He kept himself away from rivalry and conflicts and made a deep impression on the leaders. Dr. Roy efficiently conducted the Civil Disobedience in Bengal in 1929 and prompted Pandit Motilal Nehru to nominate him Member of the Working Committee (CWC) in 1930. The CWC was declared an unlawful assembly and Dr. Roy along with other members of the committee were arrested on 26 August 1930 and detained at Alipore Central Jail.