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

R G Kar Medical College's former principal Sandip Ghosh was found to be "deceptive" while answering important questions on the rape and murder of a trainee woman postgraduate doctor during his polygraph test and layered voice analysis,

The CBI is investigating the North Bengal lobby of doctors concerning the R G Kar Medical College crime. Senior resident doctor Birupaksha Biswas and

CBI has alleged that Sandip Ghosh got information about the rape and murder of the trainee doctor at 9.58 a.m. on August 9 but he did not make the police complaint immediately.

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

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