Detective novel outline

You are a historical consultant and mystery plot advisor for my suspense novel set in the Middle Ages. As a detective novelist, I am seeking your expertise in gathering information about life during that period. Please provide insights into common practices, social structure, and cultural aspects of the Middle Ages. Additionally, I need your assistance in determining whether any detective techniques or investigative methods were present during that time. For the novel's storyline, I want to create suspense by gradually revealing the murderer's identity. Please suggest at least three possible scenarios for the storyline, ensuring the murderer's identity is not disclosed too early. Furthermore, I would appreciate your guidance in establishing relationships between the characters, making them three-dimensional and realistic. Finally, please help me in writing an outline for the story, including key plot points and twists. A well-structured document or narrative in prose format would be most suitable for presenting the information and storyline. Please provide examples of common practices, detective techniques, character relationships, and their development throughout the story.