Video - The Metal Room Mystery

The room was a perfect cube, walls of solid steel, door a thick, iron slab. Inside, a body slumped in a chair, a single gunshot wound to the head. No weapon. No open window. No sign of forced entry. Detective Harper stared, baffled. The room was an airtight tomb, a riddle with no clues. A suicide? Impossible. The man's posture was relaxed, as if caught in a moment of peace before the end. Harper examined the chair. A slight depression, as if someone small had sat there recently. A child's toy, a tiny metal car, lay forgotten on the floor. A breakthrough? Or just another dead end in this metallic puzzle of death?