Referring to the killing of three brothers in Labhpur in which local Trinamool MLA Manirul Islam is alleged to be involved, Left chairman Biman Bose said police's failure to take any action against the legislator has resulted in people losing faith in the administration.
With the police dropping Islam's name from the murder chargesheet, the victims' family is moving the Calcutta High Court seeking a probe by the Central Bureau of Investigation (CBI).
The family has alleged that they are being threatened and intimidated by Islam and his men to take back the complaint they had filed against them.
"Nothing is happening in the Labhpur case. We can see how attempts are being made to shield the actual guilty. People are losing faith in the police which has become a political tool. We support the demand for a CBI probe," Bose said.
Islam who remains untouched by the police, had publicly acknowledged his crime while campaigning for the panchayat polls in 2013.
"I have crushed three people to death with my feet," Islam had said during a public rally and went on to threaten a Congress leader saying "it won't take me a minute to behead you".