They'll always be a few crazies in our midst. We can only hope not to be in their path or in their sights if or when they erupt. We cannot know the motivation that drove this twisted soul to commit this heinous action because we cannot know his mind.

To use this tragedy to further our own biases would be unseemly. Sometimes, as in the case of the 2 teenage girls in Texas who were murdered by the lonely soul they befriended, it was kindness on their parts that brought them into the damaged world of their killer, and culminated in their deaths.

The forces that drive a killer of the seemingly innocent has been dissected and bisected by learned criminologists for years and it rarely brings us closer to predicting who might cross that line or why.

http://abcnews.go.com/US/made-housto...ry?id=12510159