The debate on what makes a person more violent than another is still on. The question is whether criminals are born with such fierce nature or any incident or experience shape up such violent trait in criminals is yet to be answered. So far, scientists have proposed that certain genes (by altering brain chemistry), might be an influential factor behind such violent behavior. But DNA clues to back this suggestion is not present.
Read MoreIndividual Genes responsible for Violent Crimes: Nature versus Nurture
