Advocate M L Sharma also said a review petition would be filed as he claimed that one of his clients, Mukesh Singh, who will face the gallows, was implicated in the case.
"If ever a case called for hanging, this was it", declared the three-judge bench of Justice Dipak Misra, Justice Ashok Bhushan and Justice R. Banumathi in a unanimous verdict, thus upholding the death sentence handed to the four by a lower court and then confirmed by the Delhi High Court.
One of the accused, Ram Singh, had allegedly committed suicide in the Tihar Jail, while a convicted juvenile was sentenced three years of punishment in a reform home.
The brutality of the attack, during which she was penetrated with an iron bar, triggered what the judges on Friday described as a "tsunami of shock" in the Indian capital. "The flame of this verdict should singe not just the dastardly four but other such perpetrators in India as well", Chopra said in an open letter. The convicts had challenged the conviction and death penalty awarded to them by the high court on March 13, 2014. "In her dying declaration she appealed that her perpetrators not be spared", she added. "Rape deeply affects the entire psychology of the woman and humiliates her...the testimony of the rape victim must be appreciated in the background of the entire case and the trauma which the victim has undergone".More news: French Stocks Soar to Near-Decade Highs as Macron Tops Poll
Women and Child Development Minister Maneka Gandhi said she was happy.
The gang rape and murder or 23-year-old paramedic had led to nation wide outrage and spurred to government to strengthen rape laws.
On December 16 2012, the physiotherapy student and her friend climbed onto a bus in south Delhi, assured by the driver that they would be dropped off at their destination. After the crime, the six threw her out of the vehicle with her friend. The victim succumbed to her injuries in a Singapore hospital on December 29, 2012.
What about justice for others whose cases are pending in courts. who commit such crimes should hang their heads, not us."I slept soundly last night". More news: Beyond 100 days, Trump faces more legislative challenges
Their daughter, too, will now rest in peace, Mr Singh, and his wife Asha Devi, told Press Trust of India after the judgment.
She also said that despite the progress made by women in education and in various fields and changes brought in ideas of women's rights, "respect for women is on the decline" and "crimes against women are on the increase".
The grotesque behaviour of the convicts, the way they forced the victim for anal sex and oral sex was proven by the bite marks.More news: Tiffany Trump Is Also Moving to Washington, D.C.