“I’m on a diplomatic mission to Alderaan.”
“Princess, please. I literally just saw you fly away from the battle on this very ship like ten minutes ago.”"You are part of the Rebel Alliance and a traitor!"
same same.So far as we knew in ANH he had a strong suspicion. It’s a bit more of that now with the context of RO.
So? Why does he have to explain everything to his prisoner?