Moulana Abdul Mannan, one of the key collaborators of the Pakistan army during the Liberation war of Bangladesh, was directly involved in the abduction and killing of Chowdhury. Chowdhury had been living in Purana Paltan in 1971. In the mid of July, Moulana Mannan, an organizer of Al-Badr, came to Chowdhury for a shelter as he was shelterless and destitute at that time. Former speaker A.T.M.A. Matin was neighbor of Chowdhury. It was Matin whose request made him to rent his ground floor to Mannan. On December 15, some members of Al-Badr came to his house and took him away. Chowdhury never returned. Moulana Mannan absconded on December 16.