Looks like "this" is what he did in the two hours before the second shooting....
Gunman contacted NBC News during massacre
Sometime after he killed two people in a dormitory but before he slaughtered 30 more in a classroom building Monday morning, Cho Seung-Hui sent NBC News a rambling communication and videos about his grievances, the network said Wednesday.
Network officials turned the material over to the FBI and said they would not immediately disclose its contents pending the agency’s review beyond characterizing the material as “disturbing.” It included a written communication, photographs and video.
The network said it would release a statement shortly.
Cho, 23, a senior English major at Virginia Polytechnic Institute and State University, killed 32 people in two separate attacks Monday before taking his own life.