"He survived, but his whole body was carrying burn wounds of cigarette fire. The other detainees died from enemy torture," fellow Crack Platoon member Habibul Alam Bir Protik told the mourners at the funeral meeting of Chullu.
Chullu died from a heart attack on Oct 16 at the age of 74.
Chullu, who had a good job in a multinational drug company, was a key member of the Crack Platoon which gave very hard time to the Pakistani forces and their local collaborators, the Razakars.
The group was nicknamed 'Bichchhu' or scorpion because of their tenacity and ferocious attack techniques.
Shahidullah Khan Badal said Chullu took part in almost all the operations in Dhaka.
"Some of the guerrilla operations would have been impossible without him," he reminisced.
Chullu is the younger brother of former education minister ASHK Sadique.
His burial was delayed for his only daughter's arrival from the US on Wednesday. He has been buried at the Banani graveyard.
Earlier, the casket carrying his remains was brought to his Old Banani DOHS residence where his relatives and fellow freedom fighters gathered to bid him farewell.