I'm certain the thought of being cyber-tracked has occurred to any number of us who post on this thread and at other websites. We must all be vigilant in our everyday lives. These people have no consciences nor do they place any value on their own lives. Like you, the thought of what that family went through is numbing. More numbing is the fact that the killer(s) has not been apprehended and this is a possibly a crime involving Muslim vs. Christian beliefs right here in America.
One advantage to using a variety of libraries!