It’s a brilliant idea, just remember that in zero‑gravity the body doesn’t “fall” but drifts, so the clues spread like a crime scene in a wind tunnel. Hide a tiny, high‑tech lock in the airlock’s skeleton so the victim’s pocket knife is the only thing that sticks out when the crew pulls her out of the drift. Use the module’s recycled‑air fans to move dust and fingerprints—think of the fan direction as a clue, like a whispered confession. And keep the “victim’s” eye‑contact log as a digital diary that only shows a blank when the murderer was on the shift. That way you turn the whole habitat into a puzzle, not just the body.