Are mass murderers insane? Usually not, researchers say

If what people do is any reflection of who they are, then Devin P. Kelley, who slaughtered 26 churchgoers on Sunday in Texas, surely was a madman.

Before the atrocity, he had attempted to sneak weapons onto an Air Force base after making death threats to his superiors, according to a local police report. In 2012, he had escaped from a mental hospital in New Mexico to which he had been sent after assaulting his wife and fracturing his stepson’s skull.