Senior AIFB leader Udayan Guha raised the demand at a Martyrs' Day programme at Dinhata, claiming that the commission of inquiry which was set up then was done "to protect a few persons responsible for the firing".
Guha, however, said he did not believe that the then Chief Minister Buddhadeb Bhattacharjee had ordered the firing.
The Justice N C Sil Commission, which probed the police firing, had justified the police action in which five AIFB supporters and one NVF personnel were killed.
During an FB rally to press for their demands at Dinhata, the party workers, armed with bamboo sticks, became violent and aggressive within a short span of time, according to the findings of the Commission.
They ignored the repeated warnings of the police and started assaulting them following which the police first used batons, then tear gas shells and then fired, said the report which was tabled in the assembly in July last year after the change of guard in the state.
The report of the commission, which was submitted to the government in August, 2010, had been missing for some months but was found in July, 2012.