The bench of justices M Enayetur Rahim and Amir Hossain gave its verdict on Thursday after concluding hearing of appeals and death reference.
In 2004, Choudhury came under grenade attack while coming out of Hazrat Shahjalal’s shrine in his home town, Sylhet.
Assistant Sub-inspector Kamal Uddin died on the spot and constables Rubel Ahmed and Habil Miah succumbed to their injuries in a hospital.
At least 40 persons, including Choudhury and Sylhet’s deputy commissioner were injured in the May 21 attack.
A Sylhet court gave its verdict in the attack on Dec 23, 2008.
HuJI leaders Mufti Hannan, Sharif Shahedul Alam aka Bipul and Delwar Hossain aka Ripon got death and life sentences were awarded to Mohibullah aka Mofizur Rahman and Mufti Moin Uddin aka Abu Zandal.