This man is not lying. Pay attention to the tone that he uses. It is a tone of someone recalling a memory. His head naturally bobs back and forth (he's relaxed, but doesn't move his body to much do to the duress/natural of the conversation).

Also take note that his tone has no noticeable change throughout the duration of the conversation. This is a strong indication that he is not switching to the part of the brain that creates images and answers that one did not experience. Try to think of your home. If someone asks you a question about it, the dimensions, the colors, the furniture, where the outlets are, ect ... you can recall quite easily. Know try to create a false house in your mind. It will be very difficult to answer these questions on the fly. You might be able to talk about the facade, but the details will quickly overlap and contradict themselves. He does not hesitate to give a through answer and does not answer what he doesn't know.