This one's a little closer to me. Some Valentine's Day, huh? http://www.cnn.com/2008/US/02/14/university.shooting/index.html
For a while the Bush voters were getting closer too...contemporary US life is kind of like zombie movie, isn't it? if you're worried that the campus shootings will eventually reach you, you might want to move to Texas. All the schoolkids and college students there have already been killed, so the school shooters had to move on like geese in the winter.
According to Campus Police, it was a student from a different school. My guess is that it's some guy who was having a bad Valentine's Day and wanted to shoot up his girlfriend/ex/competition/guy his girl was cheating with. Why else would you shoot up somebody else's school?