January 23, 1996: 23-year-old Priyadarshini Mattoo, a law student, allegedly raped and killed by Santosh Singh. At the time, both were law students. Delhi Police registers FIR.
January 25, 1996: Case handed over to the CBI. Agency registers case.
April 11, 1996: CBI files chargesheet in the case against Santosh Singh.
August 11, 1997: Trial starts in the court of Additional Solicitor General S C Mittal.
January 3, 1998: Prosecution evidence closes. Fifty witnesses examined by the court. No Defence witness.
April 18, 1998: Arguments closed in the case but was marred by a controversy of allegations of money changing hands ahead of judgement. Case transferred to trial court.
December 3, 1999: Trial court delivers judgement, Santosh Singh acquitted.
February 29, 2000: CBI appeals in Delhi High Court.
October 17, 2006: High Court convicts Santosh Singh for raping and killing Priyadarshini Mattoo. The court accepts the evidence against Santosh that he was stalking Priyadarshini. He was seen outside her house on the day of murder, that is, January 23, 1996.
October 30, 2006: Santosh Singh given the death sentence by Delhi High Court. Santosh later filed a plea in the Supreme Court challenging the death sentence awarded to him.
October 6, 2010: Supreme Court commutes Santosh Singh's death penalty to life term.
(With PTI inputs)