Kolkata doctor's rape-murder: CBI starts polygraph test process on main accused, others

Kolkata: The Central Bureau of Investigation on Saturday started conducting a polygraph test on a man accused of raping and murdering a doctor at the R G Kar Medical College and Hospital in Kolkata.

The CBI, which is probing the case, also started the process of conducting the tests on Dr Sandip Ghosh, the former principal of the RGKMCH, four colleagues of the victims, and another cop. The officials went to the jail to conduct the test on Sanjay Roy, a member of the support staff of Kolkata Police, who was arrested for raping and murdering the postgraduate trainee doctor just a day after her body was found. The process to conduct the test on the others started at a facility of the central agency in Kolkata, sources said.

Roy, a civic volunteer, was arrested by Kolkata Police on August 10. He was handed over the CBI on August 13. He was in the custody of the CBI till Thursday but was sent to judicial custody by a court on Friday.

The court also allowed the CBI to conduct the polygraph test on him. He gave his consent to the test and told the court that he hoped that it would establish his innocence.

The CBI sought the permission of the court to conduct the polygraph test on him to ascertain the authenticity of what he told the interrogators since being arrested.

The findings of the polygraph test are not admissible in a court. But leads coming out of the tests may help investigators unearth new facts, which may be admissible to the court.

The Central Forensic Science Laboratory (CFSL) sent a team of experts from Delhi to Kolkata to conduct the tests for the CBI on Roy and others, sources said.

The CBI also started the process of conducting the lie-detection tests on Sandip Ghosh, who was the principal of the RGKMCH when the body of the young doctor was found at the Seminal Hall of the Department of Chest Medicine on the fourth floor of the RGKMCH.

He allegedly got an official of the hospital to inform the parents of the victim that their daughter had died by suicide.

With the protesting doctors alleging a cover-up attempt by the RGKMCH authorities and the Kolkata Police, the CBI has been questioning Dr Ghosh since August 16.

The process of conducting the polygraph test on him also started on Saturday.

The victim’s four colleagues and a cop would also be subjected to the polygraph test.