The former principal of R G Kar Medical College and Hospital Dr Sandip Ghosh on Saturday appeared before the CBI for questioning for the second consecutive day in connection with the rape and murder of a doctor.

On Friday, the agency escorted the former hospital principal for questioning which continued till 1.40 am on Saturday.

Ghosh was made to sit in a room at the CBI's city office here at the CGO Complex till 9.30 pm on Friday after which the grilling session started, an officer said.

Ghosh reached the CBI office for the second time a little before 10.30 am on Saturday for his second round of questioning.

During his first round of questioning, the former principal was asked about his first reaction after getting the news of the doctor's death whom he instructed to inform the family and how and who contacted the police, the officer said.

"Certain answers were convoluted. He was grilled till early Saturday and then allowed to leave for home," the officer told PTI.

Ghosh was asked to appear before its officers again on Saturday morning following which he reached the CBI office.

During Friday night grilling CBI officers enquired about the weekly roster where the victim was seen to be put on duty for gruelling 36 hours or at times even 48 hours, he said.

The former principal had resigned from the post two days after the body was discovered. He had expressed fears of being attacked, prompting his lawyer to seek protection from the Calcutta High Court. The court directed him to approach a single bench.

The body of the post-graduate trainee doctor was found in the RG Kar Hospital's seminar room on August 9. Police arrested a civic volunteer the next day in this connection.

Meanwhile, on Saturday afternoon a group of CBI officers went to the RG Kar Medical College and Hospital and carried out certain investigations there.

There they collected some samples and sent them to the Central Forensic Laboratory for testing, an officer said.

Another team of officers of the central agency went to the barrack of the Kolkata Police's fourth battalion where arrested accused civic volunteer Sanjay Roy used to stay, he added.

"There they spoke to the policemen who are staying there and enquired about the accused's movements on Friday morning. They took the details of when Roy returned to the barrack and what he did after reaching there," he said.

CBI officers have prepared a list of around 40 people, including doctors, police officers, whom they would be questioning as a part of their ongoing investigation, the officer said.

"So far, we have questioned 13," he added.

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