Rape and murder of doctor in Calcutta: Lie detector test revealed false, unconvincing answers by main accused Sanjay Roy

The lie detector test of Sanjay Roy, the main accused in the alleged rape and murder of a student doctor at RG Kar Medical College and Hospital in Kolkata, reportedly revealed several incorrect and unconvincing answers.

A few days after Roy claimed his innocence, he was subjected to a lie detector test by the CBI on Sunday (August 25). During the test, he said that the doctor was already dead when he reached the seminar hall of RG Kar Hospital on August 9, where the body was found.

According to a report by Times of IndiaAccording to sources, he appeared nervous and anxious when he took the lie detector test. He was confronted with several pieces of evidence for which he cited alibis and told the investigation team that the victim was already dead when he discovered her, after which he ran from the premises in fear, the report said.

The report said that Roy's lawyer Kavita Sarkar had claimed that the defence counsel was not informed about the time and place of the polygraph test and due to this, the defence counsel could not be present for the test, which is a violation of the National Human Rights Commission's guidelines.

Roy, 33, a volunteer with the Kolkata Police, was arrested by the Kolkata Police on August 10. However, after initially confessing to the crime and even helping to reconstruct the incident, he took a U-turn and protested his innocence, saying he was being framed.

He was arrested after police found a Bluetooth device near the doctor's body. Video footage also showed him on the third floor of the hospital, where the seminar hall is located.

Roy allegedly told his jailers that he knew nothing about the rape and murder at RG Kar Hospital. In fact, he agreed to take the lie detector test after making similar claims before the Sealdah High Court. He told the court that he wanted to take the test to prove his innocence.

A Hindustan Newspaper The report said his claim of innocence contained blatant contradictions and that he had attempted to mislead the investigation team. An official told the newspaper that he could not provide an explanation for the injuries to his face or why he was in the building at the time of the incident.

An official said the lie detector test was conducted in Kolkata's Presidency Jail, where the main accused is currently lodged. The test was completed after about four hours.

A team of polygraph specialists was flown to Kolkata from the Central Forensic Science Laboratory (CFSL) in Delhi. Four people, including former school principal Sandip Ghosh, also underwent the polygraph test on August 24.

The CBI has sought permission from a local court in Kolkata to subject seven people, including Roy and Ghosh, to a lie detector test, which cannot be used as evidence during the trial, but the results direct the agency to continue the investigation.