T'puram: The kin of the police officer, who was attacked by SFI activists in the capital city last week, has complained about being threatened by CPM. The family of the injured police officer Sarath has lodged a complaint to the DGP and the Commissioner. Meanwhile, the SI who failed to arrest the accused has been transferred. The police has not arrested those involved in the attack, including prime accused Nasim. The attempt of murder against Sarath has not been reported in the FIR.