I'll only buy that if they were arguing about his plan to go out and murder as many Tech students as he could and he killed her to prevent her from calling the authorities. This was a well planned event. I'm still not completely buying the lone gunman theory here.
I too believe that this incident may have been a planned event. The shooter certainly was familiar with the campus. Whether he was a student, a staff member or an outsider is open to question. A large campus like VMI is wide open for anyone to enter. It is still hard to believe the entire campus was not shut down after the first shooting incident. I also hope other university campuses around the country improve their own security. I recently visited Stanford Univ. and all facilities were wide open to visitors.