I've put my tin foil hat on. Ever since I read the OP's link- I've just had a funny feeling. Something just doesn't feel right about the entire horrible event. I can't place what feels off about the entire shooting, wish I could.
Edit- actually what gets me is how the killer "snapped" according to reports. Nobody has this much firepower staged is "snapping." This was a premeditated attack p, for what reason we may never know.