EVERY murderer is crazy, because there is NEVER a sane, rational train of thought that leads you to murder another person.
The hand-wringers of the Left are moaning about gthe availability of guns causing such tragedies as the Las Vegas massacre. Wrong approach. The soft on criminals approach that they’ve inflicted on this country is a major cause of the problem. The death penalty justly but speedily applied,while not the only solution,will help reduce violent crime.
There are people in this world who don't bother with their consciences. They make clear, cold decisions where they think of other people as if they were cockroaches.
Most of us use our consciences daily and can not fathom another person squishing others like they were bugs.