ROANOKE, Va. (AP) - Police say Virginia Tech shooter Seung Hui Cho might have made a practice run two days before the rampage.
Virginia Tech police chief Wendell Flinchum says witnesses reported seeing a suspicious male in the Norris Hall classrooms on Saturday, April 14th. Authorities found that the building's doors had been chained shut that day.
Cho killed 30 people in the building, after fatally shooting two others in a dormitory on April 16th. He had chained shut all the exits from Norris Hall before the shootings.
Cho shot himself to death as police broke through the chains and stormed the building.
Authorities have yet to find any evidence linking Cho to any of his victims. State police say investigators have not located Cho's cell phone or the hard drive to his computers.