CBI to seek opinion of AIIMS on DNA, forensic evidence

The CBI will consult experts from the All India Institute of Medical Sciences AIIMS on the DNA and forensic reports related to the alleged rape and murder of a trainee doctor at RG Kar Medical College officials said TuesdayIn order to build a watertight case the CBI will send the reports to AIIMS to seek their opinion in the case they saidThe reports will also help the agency to ascertain if Sanjay Roy was the only accused who committed the crime or there were others involved they saidThe CBI has filed an application before a Kolkata court seeking permission for polygraph test of Kolkata Police ASI Anup DuttaThe agency is investigating if Dutta knew Roy and extended any help to the accused after the crime the officials saidThe CBI had already questioned Dutta in connection with the case they saidSo far the agency is working on the leads that Roy was the only accused in the crime but involvement of others will only be ruled out after receiving the opinion of AIIMS experts the officials saidThe polygraph test on former principal of the medical college Sandip Ghosh continued for the second day Tuesday He underwent layered voice test on Saturday which was followed by polygraph test on Monday The test on Monday could not be completed and resumed on TuesdayLayered voice analysis is a new deception detection test DDT in forensic arsenal used to detect the speakers reaction to a lie It does not identify a lieThe technology identified stress cognitive processes and emotional cues in different properties of the voiceA polygraph test also a DDT can help in assessing 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 responseHowever these are not admissible evidence during the trial and can only be used to get further leads in a caseThe alleged rape and killing of the junior doctor in a seminar hall of the hospital has sparked widespread protestsThe medics body with severe injury marks was found inside the seminar hall of the hospitals chest department in the morning of August 9 by a doctor who was on roundKolkata Police arrested Roy on August 10 based on CCTV footage in which he was seen entering the seminar hall at 403 AM on August 9 when the crime was allegedly committedBased on CCTV footage Roy was put through extensive interrogation and the police had also noticed recent injuries on his left cheek abrasion in left hand between his left and ring finger abrasion over the back of left thigh among others showing signs of struggleHis biological samples like urethral swab and smear semen hair nail clippings and nail scraping were collected during the medicolegal examination they saidOn August 13 the Calcutta High Court ordered the transfer of the probe from the Kolkata Police to the CBI which started its investigation on August 14The CBI took over all the forensic evidence from Kolkata Police and also subjected Roy Ghosh four doctors who were on duty with the victim and a civic volunteer to polygraph tests to get further leads about the crimeThe initial reports from CFSL are being analysed and corroborated with evidence to get further direction to the probe the officials saidThis story has been sourced from a third party syndicated feed agencies Midday accepts no responsibility or liability for its dependability trustworthiness reliability and data of the text Midday managementmiddaycom reserves the sole right to alter delete or remove without notice the content in its absolute discretion for any reason whatsoever