The Apartment Key

I had been living alone for almost a year when I noticed my front door was unlocked one morning. I blamed myself for forgetting it, until I found the same thing happening three more times that month. Nothing was ever stolen, so I didn't report it. Then one night, I came home earlier than usual and heard someone moving inside my apartment. I stood outside and called the police without making a sound. When they arrived, they searched every room and found nobody. But one officer noticed something strange about the bedroom closet. Behind my clothes was a small hole in the wall. It connected to the abandoned apartment next door. Before leaving, the officer asked me one question: “Have you ever noticed anything missing from your bedroom?” I said no. He looked at me and replied, “Then why are there photographs of you sleeping?”