The December 16, 2012 gang-rape had led to nationwide protests and big changes in laws.
The parents of 'Nirbhaya', the 23-year-old paramedic student who was gang-raped and murdered in December 2012, has requested a Delhi court to fast-track the procedure to hang all four convicts.
In July last year, the Supreme Court confirmed that the four men responsible will be hanged. The court, which had upheld the death sentence for the men in May last year, turned down a petition from the convicts that they be given life term.
One of the convicts, Ram Singh, had hanged himself in the jail and another, a juvenile, was given the maximum sentence of three years' imprisonment in a reform facility.
The student was raped on the intervening night of December 16 and 17, 2012 inside a moving bus in south Delhi by six people. She died on December 29 in Singapore. The episode had triggered nationwide protests and led to major changes to laws on sexual crimes against women. It also put focus on the increasing number of crimes involving juveniles, bringing about change that would see them tried as adults under specific circumstances.