Walter Kenney (also known as The Tooth Fairy Killer) is a character in DEXTER. Once an infamous serial killer with over 15 confirmed victims, Walter has since retired from both his work and his murderous ways. However, he never lost the desire to kill and a recent murder in Miami clues off Dexter Morgan that his old "idol" may be back in town. What Dexter finds, however, is a dark foreshadowing of what may happen to him in the future.