David Kleinfeld is a fictional character from the novel "The Last Good Kiss" by James Crumley. He is depicted as a private investigator who navigates the complexities of crime and personal relationships in a gritty, often dark setting. His character embodies the archetype of a hard-boiled detective, facing moral dilemmas and the challenges of his profession. In the story, Kleinfeld's interactions with other characters reveal his depth and vulnerabilities. He is often portrayed as a flawed hero, struggling with his past while trying to solve cases that intertwine with his own life. His journey reflects themes of redemption and the search for truth amidst chaos.