( CNN ) -- The two men suspected of shooting to death a Chicago teenage girl are facing murder charges and will not get bond . Kenneth Williams , 20 , and Michael Ward , 18 , went before a judge Tuesday in their first courtroom appearance concerning the killing of Hadiya Pendleton , a 15-year-old who performed at a brunch before the January inauguration of President Obama . Police earlier said that Ward , who allegedly shot Pendleton , was on probation for unlawful use of a firearm . Ward confessed to shooting Hadiya and two others in late January in a case of mistaken identity , according to Police Superintendent Garry McCarthy . Police said Ward and Williams were gang members seeking revenge against the people who had shot Williams in July , men against whom Williams had refused to press charges when police arrested them . He and Ward thought they had spotted members of a rival gang at the park when police said Ward sneaked up on Hadiya and her friends and began shooting . Williams was the getaway driver , McCarthy said . Escalating gang violence has raised Chicago 's murder tally for 2012 to 500 , up 50 from 2011 , officials said .
Michael Ward and Kenneth Williams make their first court appearance Tuesday . Hadiya Pendleton , 15 , was shot to death in Chicago . Pendleton performed at a brunch before the inauguration of President Obama .