Act as an expert novelist and creative writing instructor. Write a scene (approx. 500 words) from the first-person perspective of a detective who is convinced they are the hero of the story. The scene should take place in an interrogation room. However, through subtle narrative cues, physiological descriptions, and specific word choices, imply to the reader that the detective is actually the villain or is suffering from a break with reality. Do not explicitly state the twist. Ensure the dialogue remains professional and confident, creating a sharp contrast with the internal monologue. After the scene, provide a brief commentary analyzing how you utilized subtext to achieve the effect.