McDonald’s Shooting

It was a Wednesday at work, a girl named Aileen White had enough of everyone at work. Suddenly she pulls out a machine gun she found in her grandmas house, starts shooting everyone up with no mercy. Then grabbed the hand gun and shot herself in the head. Something close to a school shooting. What would cause her to do such a thing. Police are now looking back at the cameras to see if there was anything leading up to this shooting, right now we have no information whatsoever with what triggered this attack.