I think most hourly employees that have spent any time at UPS knows that murder isn't justified, but UPS breeds a culture where you almost expect these types of incidents. Workers are pitted against each other, and you basically have to screw someone or break a rule to to accomplish the goals that UPS has set for us. If you somehow manage to do what is expected, you get nothing but more work. Like has been said, they treat everyone of us like a criminal that they just haven't caught, yet.
We sacrifice our bodies, our families, and basically our entire life for this company. A decent paycheck is not enough justification for so much sacrifice at times in such a stressful, thankless job. I don't think it's right to put ALL of this on the shooter. There are lots of employees that could do this if UPS takes the one thing they still have, because UPS has taken everything else in many cases. I bet we all work with people like this. Their wife left because they are never home, their body is broken down, and all they have is this job. It's all they know, and without it they are nothing.
I know every person I work with wasn't surprised that this happened. It's been a long time coming, and I think most people probably don't expect this will be the last time either.