I wouldn't be surprised if the Overseer was one of those people who went missing.

[It's the extra vote that's making her so suspicious, though she won't get confirmation that there's somewhere else for people to vote behind a door they haven't unlocked yet.]

If they are hiding away somewhere that more people have to die before it's unlocked, that would be just like them. Of course, if we assume they're playing fair, the Overseer probably is still among us.

[But is anything about this fair?]