Here is the opening scene of a murder mystery: Detective Jameson arrived at the mansion on a dark evening. Police officers surrounded the property with yellow crime scene tape. Mrs. White, the housekeeper, stood nervously beside the entrance hall. She was shaking like a leaf, her eyes wide with fear. Bloodstains covered the floor, forming a trail to upstairs. The air was thick with the scent of freshly baked cookies. An eerie silence hung over the usually lively billionaire's residence. The victim, Richard Langley, lay lifeless on the marble floor. His usually impeccable suit was now stained with crimson blood. A small note on his chest read "You're next, Detective".