After the assassination of Sheikh Mujibur Rahman on August 15,1975 Qamaruzzaman was arrested by the regime of the new president Khondaker Mostaq Ahmad and imprisoned in the Dhaka Central Jail with Tajuddin Ahmed, Syed Nazrul Islam and Mansur Ali.
After the assassination of Sheikh Mujibur Rahman on August 15,1975 Qamaruzzaman went underground with other Mujib loyalists. He was arrested by the regime of the new president Khondaker Mostaq Ahmad and imprisoned in the Dhaka Central Jail with Tajuddin Ahmed, Syed Nazrul Islam and Mansur Ali.