New Delhi (CNN) The Supreme Court rejected the petition for clemency filed by three of the convicts in the infamous gang rape that took place in New Delhi in 2012.

The incident that shocked the country six years ago came to a conclusion today with the mother of the victim (also known as Nirbhaya, which means fearless) thanking the Supreme Court for justice, even though it was delayed.

"Till they are hanged, she and other girls won't get justice. Not just Nirbhaya, other girls in this country should get justice," said Asha Devi, the victim's mother.

Three of the convicts, Vinay Sharma, Pawan Gupta and Mukesh Singh had filed a clemency plea with the Supreme Court last year. The fourth death-row convict, Akshay Thakur is expected to file his review petition next week with the court.

The victim's mother, Asha Devi said her daughter won't get justice until those who rapes and killed her are hanged.

The defense lawyer for two of the petitioners, A.P., Singh insisted that his clients had cause for filing a curative petition. A curative petition is the final legal recourse that can be filed if the defense counsel can show discrepancy in the judgment.