In Cormac McCarthy's novel No Country for Old Men, Chigurh seems to be very goal oriented.  His main goal is to return the stolen money to its rightful owner, and he is willing to do anything necessary to complete that task.  Although he is brutal, his actions do suggest that he is trying to carry out a sense of justice that the other characters have, perhaps in his mind, earned.  For example, he tells Moss that he will not kill Carla Jean if Moss will simply return the money.  He gives Moss the opportunity to save Carla Jean because he wants to get his job done.  When Moss scoffs at this, Chigurh feels compelled to carry out the punishment of Carla Jean.  He does seem to be guided by his own set of principles.