Unsolved Mystery

"Milo! Don't forget to take your prom dress and lock the main door before you leave." Mom shouted while leaving for work at at noon. Milo heard her and dozed off. The alarm clock blared at 4 pm, which made her spring up with a jolt."Gosh! I'm late. Let me wear my dress here instead." she locked the door behind her. Hours ticked by, and Mom returned from work to find the dress in her closet. She