A city court rejects CBI's plea to conduct a narco analysis test on Sanjay Roy, who was arrested in connection with the rape and murder of a doctor in RG Kar Medical College and Hospital.
The central probe agency on Friday had appealed to the city-based Sealdah court seeking permission to conduct the test on Roy.
"This is primarily to cross-check whether Roy is telling the truth. The narco analysis test will help us to verify his version," a CBI officer told the media.
During a narco analysis test, a drug sodium pentothal is injected into the body of the subject which takes him to a hypnotic state, and his imagination is neutralised, the CBI officer explained.
"In most cases, the accused gives the true information," he said.
The Central Bureau of Investigation has already conducted polygraph test on Roy inside the Presidency Correctional Home.