CBI officials questioned Dr. Birupaksha Biswas and Dr. Avik Dey, allegedly linked to former RG Kar Medical College principal Sandip Ghosh, about the rape-murder of a woman medic. The interrogation focused on their unauthorized presence at the hospital on August 9.

The CBI officials questioned Dr Birupaksha Biswas, part of the so-called North Bengal lobby, on Saturday at its Salt Lake office.

The doctors Birupaksha Biswas and Avik Dey are being interrogated at the CBI's CGO Complex office in Salt Lake

CBI sleuths on Saturday started questioning another doctor, allegedly close to the arrested former principal of RG Kar Medical College and Hospital Sandip Ghosh, in connection with their probe into the rape-murder case.

CBI questions Dr. Birupaksha Biswas, part of 'North Bengal lobby', in connection with woman doctor's rape and murder case.

As per CBI, Dr Birupaksha Biswas was seen at the hospital on August 9 – the day of the crime – despite no official engagement there.

Biswas was recently transferred from Burdwan Medical College and Hospital to Kakdwip Hospital in South 24 Parganas district by the West Bengal government. He appeared before CBI officers at their CGO Complex office in Salt Lake area,

Saturday, September 21, CBI investigators began questioning another doctor, allegedly linked to the arrested former principal of RG Kar Medical College and Hospital, Dr Sandip Ghosh, as part of their probe into the rape and murder of a woman doctor at the institution,

The CBI has approached the court for permission to conduct narco analysis on former principal Sandip Ghosh and a polygraph test on ex-Tala PS OC Abhij