Published Fri, Dec 9, 2011 10:53 am Dateline
State police say the gunman who killed himself at Virginia Tech acted alone in the slaying of a campus police officer.
Police spokeswoman Corinne Geller says the gunman ran from the scene and changed clothes before killing himself in a parking lot a half-mile away.
Geller says the gunman, whose identity has not been released, was later found by an officer in the campus parking lot. The man shot and killed himself.
Geller said at a news conference this morning that the gunman put his clothes in a backpack and left it behind at a greenhouse on campus.
Geller says investigators are still trying to find out why the gunman ambushed the officer, Deriek W. Crouse.