The CB-CID team, probing the sexual assault of a girl student in Kanpur, has said that the DNA test of the school manager and his two sons have matched with the semen found on the clothes of the victim. The 12-year-old girl was sexually assaulted by Piyush, younger son of the school manager Chanderpal Verma, the team said in its report. The report also held guilty Verma and his elder son Mukesh for not taking the victim to the hospital following which the girl died.