This document outlines two concepts for a murder mystery/thriller film. The first concept involves a serial killer who builds relationships to murder women and seduces the detective's wife, leading to a climactic fight scene. The second concept involves a killer who murders his wife and must cover it up by killing others, with the detective coming close to solving the case multiple times. Both concepts would feature scenes of the killer dragging a body through woods and digging a grave, and involve a detective struggling to catch the killer. The document provides suggestions for locations, props, actors, technical elements, comparable films, unique selling points, and micro-elements for each concept.