Sanjay Roy, the primary suspect in the alleged rape-murder of a trainee doctor at Kolkata's RG Kar Medical College and Hospital, allegedly gave multiple incorrect and inconsistent responses on the polygraph test.

Roy was put through the lie-detection test by the CBI on Sunday, August 25, days after he declared his innocence in the case. During the examination, he claimed that when he arrived at the RG Kar hospital's seminar hall—where the body was discovered on August 9—the female doctor had already passed away.

He seemed apprehensive and uneasy throughout the polygraph, according to sources quoted in a Times of India story. He was shown multiple pieces of evidence, to which he responded with alibis, and he informed the detectives that the victim had already passed away when he saw her, according to the report. He then fled the scene in terror.

According to the report, Kavita Sarkar, Roy's attorney, said that the defense attorney was not notified of the date, time, or location of the polygraph examination. Due to this, it was not possible for a defense attorney to be present throughout the test, which is against National Human Rights Commission guidelines.

Roy, 33, a civic volunteer was taken into custody by the Kolkata Police on August 10. But he later changed his mind, claiming he was being set up, even though he had previously admitted to the crime and even offered assistance in reconstructing the event.

A Bluetooth gadget discovered by the police next to the doctor's body led to his arrest. Additionally, he was captured on camera on the hospital's third floor, which houses the conference room.

According to reports, Roy informed his jail guards that he was unaware of the rape and murder that had taken place at the RG Kar hospital. Indeed, having made identical allegations before the extra chief judicial magistrate court in Sealdah, he gave his assent to the polygraph examination. He stated in court that he intended to take the exam in order to demonstrate his innocence.

There are obvious contradictions in his denial of guilt, and he has been attempting to mislead the inquiry team. A policeman informed the newspaper he was unable to explain why he was at the building at the time the crime was committed or why he had facial injuries.

The primary accused is currently being held at Kolkata's Presidency Jail, where the lie-detection test was carried out, according to an officer. It took almost four hours for the test to end.

The Central Forensic Science Laboratory (CFSL) in Delhi sent a team of polygraph experts to Kolkata via flight. On August 24, four more people, including former principal Sandip Ghosh, took the polygraph test.

In order to subject seven people—including Roy and Ghosh—to a lie-detector test that cannot be used as evidence in court, the CBI has requested authorization from a local court in Kolkata. But the results point the agency in a direction to continue the investigation.

(Input from various sources)

(Rehash/Priyanka Pandey/MSM)