While Roy was to take his lie detector test in jail, the others were called to the CBI office at the CGO Complex in Salt Lake, Kolkata.

Meanwhile, the Special Investigation Team (SIT) has submitted all documents related to the alleged financial irregularities in the case to the CBI, a week after the Calcutta High Court transferred the probe to the investigating agency.

Kolkata doctor rape and murder case – What we know so far:

1. The body of the 31-year-old female trainee doctor was found half-naked in the seminar hall of the RG Kar Medical College on August 9.
2. According to police, the incident took place between 3 a.m. and 5 a.m.
3. The victim’s autopsy report revealed that the woman had been sexually assaulted and then strangled and suffocated.
4. According to the investigation, the arrested suspect, identified as Sanjoy Roy, severely assaulted and sexually abused the doctor and then killed her by strangling and choking her to death.
5. The CBI told the Supreme Court on Thursday that there was an attempt to cover up the rape and murder of the medical graduate by local police as the crime scene was altered before the federal agency took over the investigation.
6. The main suspect, Sanjoy Roy, is being held in cell number 21 of the jail under tight security. He is alone in the cell. CCTV cameras have been installed outside his cell to keep a close watch on him.