Family of 33-year-old bus driver Ram Singh says he was murdered.
"He has not committed suicide, he has been murdered. There should be a CBI inquiry into his death," said his father.
"He couldn't have committed suicide. He admitted to his mistake. Even God forgives, he could have pleaded for mercy," his mother said.
"We demand a high level judicial inquiry by a sitting judge of the High Court or retired judge of the Supreme Court," said Vivek Sharma, defence counsel for Pawan Gupta, another accused.
"In a high security jail, occurrence of such an incident is condemnable and raises serious suspicions on the security of the accused persons. We will move an application for seeking security," added Sharma.
In fact, the trial of the case is on at a fast track court in New Delhi. The deceased Ram Singh and four other accused were charged with murder, gang-rape, destruction of evidence, criminal conspiracy, dacoity, unnatural sex and common intent in the case.
As the sixth accused has been declared as a juvenile, his case will be tried by a juvenile court.
On Decemeber 16, 2012, a group of six men brutally gang-raped and assaulted the 23-year-old women inside a moving bus. Later the victim died in a Singapore hospital on Decemnber 29.
In fact, Ram Singh was the driver of the bus, where the victim and her friend were seriously injured and assaulted, before they were thrown out of the moving bus to die on the roads of national capital.
The case woke up the entire nation. People protested on the streets and demanded death penalty for rapists. The government also formed Justice JS Verma committee to come up with strict laws to deal with sexual crimes committed against women.
But, anti-rape law is yet to be passed by the Parliament,as differences have cropped up among the cabinet members on various issues regarding the law.