The woman died of grave intestinal injuries on December 29, 2012 at Singapore's Mount Elizabeth Hospital, where she was airlifted for specialised treatment.
One of the six accused was found dead in a cell in Delhi's Tihar Jail. A juvenile involved in the crime was Aug 31, 2013 sent by the Juvenile Justice Board to a reform home for three years, the maximum term under the juvenile law.
The trial court on September 13, 2013 awarded the death sentence to Mukesh (26), Akshay Thakur (28), Pawan Gupta (19) and Vinay Sharma (20).
The court referred the case to the high court for confirmation of the sentence.
The chargesheet was filed Jan 3 last year.