It didn't even really take him a moment to register everything wrong with Itachi, from the voice, the words, even the way he was standing. It makes something sink inside his chest and he gestures sharply for him to close the door, only speaking once that was accomplished.

"You're not Itachi. A few quick questions then. How long have you been switched? Is he in mortal peril due to where your body was? Has anyone given you Itachi's medication? And who, exactly do I have the grace to be speaking to at present?"