One question is of whether the teacher effected a theft of identity; alternatively, he may have been a precocious killer who had sneaked back into the country.
I wonder if the teacher actually found her in the closet back when she was a kid and refused to kill her. His portrayal more ambivalent than I'd expect for a hardened killer.
Probably just some weird reflections of the light off the lacquer that cause the illusion of the eyes moving, because foreshadowing