<p>New Delhi/Kolkata: The <a href="https://www.deccanherald.com/tags/cbi">CBI</a> has sought permission from a <a href="https://www.deccanherald.com/tags/kolkata">Kolkata</a> court to conduct a polygraph test on city police assistant sub-inspector Anup Dutta who was said to be close to Sanjay Roy, the arrested accused in the rape and murder of a trainee doctor at RG Kar medical college, officials said Tuesday.</p><p>The CBI is exploring if Dutta helped Roy in any cover up of the crime, they said.</p>.Kolkata rape-murder: BJP demands Mamata's polygraph test, condemns lathi charge on Nabanna protestors .<p>According to reports, Dutta was allegedly instrumental in extending various favours to Roy, they said.</p><p>The central probe agency is trying to find out if Roy told Dutta about the crime and received any help, they said.</p><p>They said the court would decide the application for a polygraph test after seeking Dutta's consent on the issue.</p><p>The CBI completed polygraph tests on former principal of the medical college Sandip Ghosh on Tuesday, the third day of subjecting him to a series of Deception Detection Tests (DDT), they said.</p><p>He underwent a Layered Voice Analysis test on Saturday, followed by a polygraph test on Monday. The test on Monday could not be completed, so it was resumed on Tuesday.</p><p>Layered voice analysis is a new DDT in the forensic experts' arsenal. It detects the speaker's reaction to a lie but does not identify a lie. The technology identified stress, cognitive processes, and emotional cues in different voice properties.</p><p>A polygraph test, also a DDT, can help assess inaccuracies in statements of suspects and witnesses. By monitoring their psychological responses -- heart rate, breathing patterns, sweating, and blood pressure -- investigators can determine if there are discrepancies in their responses.</p><p>However, these are not admissible evidence during the trial and can only be used to get further leads in a case.</p>
<p>New Delhi/Kolkata: The <a href="https://www.deccanherald.com/tags/cbi">CBI</a> has sought permission from a <a href="https://www.deccanherald.com/tags/kolkata">Kolkata</a> court to conduct a polygraph test on city police assistant sub-inspector Anup Dutta who was said to be close to Sanjay Roy, the arrested accused in the rape and murder of a trainee doctor at RG Kar medical college, officials said Tuesday.</p><p>The CBI is exploring if Dutta helped Roy in any cover up of the crime, they said.</p>.Kolkata rape-murder: BJP demands Mamata's polygraph test, condemns lathi charge on Nabanna protestors .<p>According to reports, Dutta was allegedly instrumental in extending various favours to Roy, they said.</p><p>The central probe agency is trying to find out if Roy told Dutta about the crime and received any help, they said.</p><p>They said the court would decide the application for a polygraph test after seeking Dutta's consent on the issue.</p><p>The CBI completed polygraph tests on former principal of the medical college Sandip Ghosh on Tuesday, the third day of subjecting him to a series of Deception Detection Tests (DDT), they said.</p><p>He underwent a Layered Voice Analysis test on Saturday, followed by a polygraph test on Monday. The test on Monday could not be completed, so it was resumed on Tuesday.</p><p>Layered voice analysis is a new DDT in the forensic experts' arsenal. It detects the speaker's reaction to a lie but does not identify a lie. The technology identified stress, cognitive processes, and emotional cues in different voice properties.</p><p>A polygraph test, also a DDT, can help assess inaccuracies in statements of suspects and witnesses. By monitoring their psychological responses -- heart rate, breathing patterns, sweating, and blood pressure -- investigators can determine if there are discrepancies in their responses.</p><p>However, these are not admissible evidence during the trial and can only be used to get further leads in a case.</p>