Are killers born or made? Depending on who you ask, you'll get a variety of responses: all humans are good - it's only the 'environment' or 'society' that makes them do bad things; anyone who engages in murder must be a cold-blooded psychopath, born to kill. But simple explanations come from simple minds. It's not a matter of either/or. Some people are born that way, like psychopaths. Some have the strength of character to resist the impulse to conform. But most people are somewhere in...