A Good question.
Also, in light of the under mentioned text where it is explained that God gives the unrighteous over to their own desires. - How do we relate Romans 1:28-32 and this question to Psychopaths and other mentally deranged people?
28 And even as they refused to have God in their knowledge, God gave them up unto a reprobate mind, to do those things which are not fitting; 29 being filled with all unrighteousness, wickedness, covetousness, maliciousness; full of envy, murder, strife, deceit, malignity; whisperers, 30 backbiters, hateful to God, insolent, haughty, boastful, inventors of evil things, disobedient to parents, 31 without understanding, covenant-breakers, without natural affection, unmerciful: 32 who, knowing the ordinance of God, that they that practise such things are worthy of death, not only do the same, but also consent with them that practise them.
Romans 1:28-32 (ASV)