Keith Clayton is the villain of the book and its film adaptation titled The Lucky One. The book was written by Nicholas Sparks.
Keith was the ex-husband of Beth and was very controlling towards her. He threatened to take away her son permanently and one time nearly shot and killed Logan while a little bit drunk. He was a mean guy and often treated his son Ben like a servant. He seemed to redeem himself at the end of the movie being nicer and giving up being a cop. He died after Ben's tree house collapsed on him while he was trapped in the river trying to rescue Ben.