Animesh Datta, son of Sumer Kumar Datta, was smothered to death by a group of seven men when he tried to stop them from robbing his house in the wee hours of Thursday.
The crime took place between 2.30am and 3.30am in Madhuban Colony. The dacoits first held the 70-year-old retired senior lawyer, Sumer Kumar Datta, and his wife, Prabha Datta, hostage and tied them with clothes before entering Animesh's bedroom. They decamped with cash and jewellery worth over Rs. 2 lakh.
After the robbers left, the Dattas managed to untie themselves and rushed to Animesh's room where they found him lying unconscious with his hands and legs tied with clothes.
"There has been no concrete clue about the identity of robbers. Though we are suspecting the involvement of a notorious gang of Bangladeshi robbers behind the incident, several labourers who were working in the adjacent houses are also being questioned at length," said an investigating officer.
According to the officer, they have collected fingerprints of over half-a-dozen persons from the house. The fingerprints are being matched with the prints of robbers, arrested in the past for similar offences.
A police officer said they were also checking the call records and current location of the three mobile phones which were robbed from Dattas' house. The phones have been kept on electronic surveillance, the officer said.