The setback, if any, for investigators comes after CCTV footage provided by the hotel did not contain any pictures of the victim and the alleged rapists emerging from the hotel on Kolkata’s signature street.
In the early hours of February 6, five men allegedly gangraped the victim in a moving car in and around Park Street after the men befriended her at a disco and offered her a lift home.
Forensic science expert Dr Parag Baran Pal of Sagar Datta Medical College and Hospital said samples should be tested within 48 hours. Between 48 and 96 hours, DNA tests can be done for confirmation.
“Swab and semen must be sent to the Central Forensic Science Laboratory for a DNA probe. The DNA from intact spermatozoa could be collected within 96 hours,” Dr Pal said.
But in this case, the samples were never sent for a DNA test, raising questions about the professionalism of the probe.