should be obvious but the people that claim to be alone in a room could have killed someone in that room.
I would not be surprised if two impostors went to lab to try to double kill blazade and someone that followed him there but because there were 5 people they couldn't do it without exposing themselves. just a guess, but there were at most two kills (one of the people missing could have been on security), so there are definitely impostors in the larger grouped rooms (1 in utilities is also possible).
if anyone had a room of exactly 2 people, they are very likely both crew, so please come forward if you had this scenario.
az If a scientist is in utilities and an impostor shuts the lights off from utilities, would the scientist be able to see that he shut the lights off before it happened or would it be the same as every other room where the lights are off