Iraqi authorities put Saddam and seven other former Iraqi officials on trial on 19 October 2005, four days after the 15 October 2005 referendum on the new Iraqi constitution. The tribunal specifically charged the defendants with the killing of 148 Shiites from Dujail, in retaliation for the failed assassination attempt of 8 July 1982. Supporters of Saddam protested against the trial in Tikrit. After the charges were read to them, all eight defendants pleaded not guilty. While initially open to the public, the trial was closed to them on 15 March 2006, after Saddam began making political statements on the stand and an argument began between him and the presiding judge.