JJB presided over by Principal Magistrate Geetanjali Goel concluded its inquiry that began in March against the juvenile, who, the police claimed, was the "most brutal" of all the six accused persons.
After hearing the final arguments in the matter, the JJB reserved its order for July 11, saying the prosecution and defence could give any clarification they want to on that day, police sources said.
The JJB also concluded its inquiry in the case against the juvenile pertaining to robbing Ramadhar, a carpenter who had boarded the bus on the fateful night of December 12, 2012 and thrown out before the girl and her friend were assualted.
The girl had died in a Singapore hospital on December 29. A native of Uttar Pradesh who had moved to Delhi as an 11-year-old and took up menial jobs, the juvenile was one of the six accused persons arrested in the case.
While he faced inquiry before the JJB, the four adult accused are being tried before a fast track court. Key accused Ram Singh was found hanging in Tihar Jail in March and the proceedings against him stand abated.
During the inquiry, the JJB recorded the statements of six prosecution witnesses including the victim's male friend and also the carpenter.
The counsel for the juvenile had submitted that there was no medical evidence against him to connect him with the charges and no finger prints could be detected in the bus to show his complicity, the sources said.
The defence counsel had claimed that the juvenile had been implicated by the police though neither the victim nor her male friend had done so in their initial statements.
He had also said that the victim's male friend, who is the complainant in the case, did not depose against him even before the JJB and alleged that Ramadhar, who is said to have identified him as one of the six accused in the bus, had deposed falsely at the behest of the police.
The juvenile had in his statement recorded by the Board during the inquiry claimed innocence and refuted the police version in the charge sheet of him being the "most brutal" of all the accused.
He had claimed he was himself victimised by his employer and prime accused Ram Singh, who, he said, did not pay him for his work.
Besides the juvenile, four adult accused facing trial in the case are -- Mukesh, Pawan Gupta, Vinay Sharma and Akshay Thakur. They have been charged with gangrape, murder, criminal conspiracy, unnatural sex and robbery besides other sections of IPC.