How many times over the course of your life have you played a game with that one person who can’t help cheating to win the game? They are out there. In stories, they most definitely are there. They are called the antagonist, your villain. And they don’t play by the rules. In their minds the law doesn’t apply to them. If they can get what they want by breaking the law, so be it.
Their drive comes from interest in themselves. Their behavior is immoral/amoral. They lie, cheat, steal, deceive, and manipulate. If it puts money in their own pockets, they will take a bribe, blackmail, or do whatever it takes. Whatever the case, they always have ulterior motives.
When creating your villain, think outside the box. What are some creative ways your villain can break the rules to achieve their goal(s)?