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

Another controversial and now-suspended doctor Avik Dey, known to be a close confidant of the R.G. Kar Medical College & Hospital's former and controversial Principal Sandip Ghosh, arrived at Central Bureau of Investigation (CBI)'s Salt Lake office in northern Kolkata for interrogation in connection with the ghastly rape and murder of a lady junior doctor of the hospital within the hospital premises last month.

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

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

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,