With each passing hour, we learn more about the 22-year-old suspect. And everything we learn adds to the profile of a deeply troubled young man detached from reality. There is nothing to date that suggests any partisan motivation for his crimes, whether right-wing or left.

Dupnik needs to recall that he is elected to be a lawman. With each additional comment, the Democratic sheriff of Pima County is revealing his agenda as partisan, and, as such, every bit as recklessly antagonistic as the talk-show hosts and politicians he chooses to decry.