[J pold]

One person was killed and others were wounded at multiple locations inside a dormitory about 7:15 a.m., Flinchum said. Two hours later, another shooting at Norris Hall, the engineering science and mechanics building, resulted in multiple casualties, the university reported

http://www.cnn.com/2007/US/04/16/vte...ing/index.html

What I don’t understand is how can some walk into a dorm shoot and kill someone while, wounding others and commit the same act 2 hours later? Couldn’t someone have stopped the second attack especially if there was only one shooter?