Are serial killers genetically predisposed to commit murder or is it their upbringing that drives them to become killers? Humans have been killing for many years, but ever since the judicial system has been around there have been punishments created for such actions.This is where the science steps in. Are serial killers genetically predisposed to commit murder or is it their upbringing that drives them to become killers? How is a reckless killer made? In this essay I will be covering the topic