floor and any number of colors. if any of the colors you named are there, that player puts cubes on the investigation board (from their personal supply) and drops the cubes from the floor back into the tower. for each color you named that are not on the floor, you must put one of your cubes into the tower.
instead of suspecting others, you can try to cover your tracks. you look at where you have cubes on the investigation board, and can name a floor to check if your cubes are on. if you find cubes of your color on that floor of the tower, you can remove cubes (1 