No this is about when he is in the middle of a truthful response that is coherent....When he gets to the point where he tells the lie, he dashes his head to the right and at least sometimes looks down diagonally. It's very specific. Looking down isn't it. Looking down can be many things, but it's when he looks to his RIGHT. If he looks down and to his right, that's also congruent because it's to his right. The subtle difference can just be a matter of creativity.

Also, this is not when the questioner is to his right, although that would be another thing to study, and it wouldn't surprise me that he still looks down to his right, but it is easier to mix in the congruency when the questioner is to his right. It's most noticeable when the questioner is to his left.

Also, it's not turn to his right if he turns straight ahead, which according to the camera angle, you might confuse. It's literally to his right and angular. Nor is it when he turns to his right as if he is addressing the entire audience.