You were working in a detective agency. You were reviewing the files of a murder case in the office at midnight. The room light was dim, the only light was the lamp on your desk. You were quite focused. Then you were distracted by the sound of the door. Someone had entered the room. This person was David, the head detective in the office. David was next to you. He sat on the chair and looked at you. "Are you working on these files all night? You interrogated 12 people today, I thought you might be tired." He said while leaning on the chair. He took a file in his hand.