Mise-en-scene analysis

Mise-en-scene is the arrangement of the scenery, props, etc. on the stage of a theatrical production or on the set of a film.  It is essentially the physical elements within a given scene.

Mise-en-scene of the image

Murder, weapons (on bed, gun), minimalistic (bed backboard is clean, wall is made into perfect squares), formal setting, room is still clean (no blood), wires connected to each victim, suitcase on bed (looks like money or a bomb), everyone dressed formally, no visible body trauma (mysterious)