in the kitchen or tables should have some false knifes, so Traitors that need a c4 and had a knife, can drop it and hide in those places , so the innocents and Detective is going to think its a false knife and after buying c4 planting it, should get the knife back
and what about, if Traitors got the car, but there is hidden innocents? could they use cars to plant c4 inside and the car explodes so Traitors win? or sabotage it for difficulting innocents work?