Yes , there is a high possibility they are all mafia, and recruit some one on day 1. There is a chance they are 5 (4 now kdnows died). And they can tell they get another one easy like that and say whathever they want, we probably dont have detective anymore. If i am not wrong , what i get from faust is that he is insane doctor and go for 3c in the second night? There is a chance that he kill him and another recruit happend? In the first night , I had assumed that the nii-chan was the body guard and the mafia tried to kill him... But now I do not know, I have to re-read some things more calmly.