When you think about it, Perez would have been asked to go to the Diary Room first if this had been real. I'm surprised the others that saw him walking through the house didn't think of it. I'm sure Perez would have been asked to go to the Diary Room first if this wasn't a secret mission. The others that were watching him didn't think of this. I mean, really, would they have let him walk without at least calling him to the Diary Room first? I don't think so.