The court, however, refused saying, “It can't be three months. Of course not.”
The high court had granted him parole in May last year for 13 days for writing his second-year exams. He had been granted parole in 2012 for his first year exams.
Singh, a law student in Delhi University, had raped and murdered Mattoo, a third-year law student, in January 1996.
He was acquitted by the trial court on December 3, 1999, but the Delhi High Court had on October 27, 2006 reversed that decision, holding him guilty of rape and murder.
The high court had also awarded death penalty to him in the case. Singh, son of a former senior IPS officer, had challenged his conviction and death sentence awarded by the high court.
In October 2010, the Supreme Court had upheld Singh's conviction but reduced the death sentence to life
imprisonment.