NEW DELHI —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 Tuesday. In order to build a watertight case, the CBI will send the reports to AIIMS to seek their opinion in the case, they said. The 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 said. Also read: Kolkata: Protesters, policemen injured as clashes erupt during ‘Nabanna Abhijan’ rally The CBI has filed an application before a Kolkata court seeking permission for polygraph test of Kolkata Police ASI Anup Dutta. The agency is investigating if Dutta knew Roy and extended any help to the accused after the crime, the officials said. The CBI had already questioned Dutta in connection with the case, they said. So 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 said. The polygraph test...