Police identify massacre gunmanBy staff and correspondents in the US April 18, 2007 01:39am Worst campus shooting incident in US history Domestic incident may have preceeded killing spree Witnesses describe panic, horror THE deadliest school shooting in US history was carried out by a 23-year-old loner from South Korea who was studying for an English major, university and police officials said today. Police identified Cho Seung-Hui, a legal US resident, as the shooter at Virginia Tech University and said he may have acted alone in killing 32 people before committing suicide yesterday. Cho was an undergraduate student in his senior year majoring in English, said campus police chief Wendell Flinchum. He lived on campus at Harper Hall dormitory and his residence was established in Centreville, Virginia outside Washington, police said. He was a 23-year-old South Korean here in the US as a resident alien, Mr Flinchum said. Virginia Tech University Charles Steger told ABC...