Is Dr. Sandip Ghosh Mastermind Behind Kolkata Rape-Murder? CBI Tracks Mobile Records Of Former RG Kar's Principal

Kolkata Rape-Murder Case: The Central Bureau of Investigation (CBI) probing the rape and murder of a woman doctor at state-run R.G. Kar Medical College & Hospital is now tracking the mobile phone calls made by former principal.  Dr Sandip Ghosh immediately after the body was detected in the seminar room on August 9 morning.

Sources said that by tracking the phone calls made or received by Ghosh then, the investigating officials are trying to figure out what exactly transpired during the course of conversation during those calls. 

To be more precise, sources added, the investigating officials are keen to track whether Ghosh passed on any information or gave any instruction on the tragedy to anyone or vice versa from anyone on that morning. The CBI officials have already conducted a polygraph test of Ghosh.

The trainee doctor was allegedly raped and murdered in the seminar hall of RG Kar Medical College and Hospital when she had gone to rest during her graveyard shift in the early hours of August 9. Her body with severe injury marks was found inside the hall by a doctor who was on rounds.

Roy was arrested the next day based on CCTV footage in which he was seen entering the seminar hall at 4.03 am on the day of the incident. He was put through extensive interrogation when "recent injuries" on his left cheek, abrasion on the left hand and the back of his left thigh, among others, showing signs of struggle were recorded by police.

His biological samples like urethral swab and smear, semen, hair, nail clippings and nail scraping were collected during the medico-legal examination. On August 13, the Calcutta High Court ordered the transfer of the probe from the Kolkata Police to the CBI, which took over the case on August 14.

After taking over the case, the CBI subjected Roy, former principal of the medical college Sandip Ghosh, four doctors who were on duty with the victim, and a civic volunteer to polygraph tests to get further leads about the crime.