District and Sessions Judge Dilip Kumar Bhowmik passed the much-awaited verdict on Thursday after hearing all sides of arguments.
The six other convicts to be hanged are Kader’s aide Md Shamsuzzoha, chauffer Abdul Hannan, Mehedi Hasan, Shaheen Mia, Anwarul Islam Rana and Chandan Kumar Roy.
Roy is on the run while the other suspect, Subal Chandra Roy, died in prison during trial.
Kader is now serving life term after the court sentenced him on June 11 in another case related to the murder but under the arms law over the recovery of weapons that police said were used in the killing.
On the evening of Dec 31, 2016, unidentified assailants shot the ruling party MP from Gaibandha-1 (Sundarganj) constituency. He died an hour later at a hospital in Rangpur.
Kader, a retired army officer and the former MP from the same constituency, had masterminded the killing “to clear his path for election”, police said.
