I dig the aesthetic and vibe. It's a cool little world I'd like to learn more about. The use of mannequins instead of live characters gives it an interesting feel... almost as if it's not the actual crime scene, but a reconstruction of it, or maybe a simulation or a test of some kind.
I'd love to see this developed further, with more interactivity within each car, maybe some puzzle elements, hidden items/notes, etc.
Nice work!