India, June 11 -- A year after Air India 171 - a London bound Dreamliner - crashed seconds after takeoff in Gujarat's Ahmedabad, the memory of the victims still haunts the forensic experts who helped identify them. The June 12 crash killed 241 of the 242 people on board.

HP Sanghvi, director of the Gujarat Directorate of Forensic Sciences, reveals a particular image that remains with him. Sanghvi, and his team of 38 forensic scientists, worked relentlessly for 15 days to sift through the biological samples of those who lost their lives in the tragedy.

The forensic chief recalls a woman's severed hand, with fingers locked tight together as if pleading for help. "It looked as if she was pleading for help. Even now, a year later, we can on...