A three-member CBI team visited the house and nursing home of Sudipta Roy, former chairman of the Rogi Kalyan Samiti of RG Kar Medical College and Hospital, in Sinthee in the city’s northern fringes on Sunday.

Sources said the officers wanted to question him on certain leads that emerged during the probe into the rape and murder of the junior doctor at the hospital on August 9.

A CBI team visited Roy’s house and nursing home on September 12 in connection with the probe after it emerged that Sandip Ghosh, former principal of the hospital, had called Roy several times on August 9 morning.

CBI’s visit to Roy’s house and nursing home came within an hour of Apurba Biswas, faculty member of forensic science department of RG Kar, said someone who claimed to be close to the victim had told him on August 9 that the post-mortem must be held during the day.

“Someone who claimed to close to the victim’s family, possibly a former councillor, told me that the post-mortem should be completed by that day or else there would be bloodbath,” Biswas told reporters while leaving the office of the CBI at the end of the day’s questioning.

Biswas was among the four doctors the CBI questioned on Sunday. The other three are Birupakshya Biswas, Avik De and Saurav Pal.

Birupakshya Biswas, De, and Pal are alleged to be close to the former principal of the RG Kar.

Besides the four, the CBI also questioned a sub-inspector of police at Tala police station and three assistants who work at the RG Kar morgue.

Apurba was among the board of three doctors who conducted the post-mortem of the junior doctor and submitted a report.

Forensic medicine experts Rina Das and Molly Banerjee were the other board
members.

While Apurba has faced CBI interrogators earlier, the three others including De, Pal and Biswas faced the officers of the central investigating agency for the second day on the trot.

Sources in the CBI said De, Pal and Biswas were questioned about what they knew of the August 9 incident. Biswas and De were allegedly present in the seminar room on the third floor of the Emergency Building where the body was found.

Biswas has so far maintained he did not visit the scene of the crime in the seminar room the day the junior doctor was found dead even though he was present at the RG Kar Medical College and Hospital.

CBI sources said the police officer from Tala police station was present at the crime scene with one of his senior colleagues and later joined the special investigation
team set up by the Kolkata Police to probe the rape and murder case as one of its
members.

The statement of the officer about what he saw when he reached the crime spot on the morning of August 9, sources said, was vital because investigators would tally it with what Abhijit Mondal, the officer-in-charge of Tala police station who has been arrested in this case,
has said.