Personally I feel like the truth will come out within these next couple episodes. Whether it be White telling Sean upfront, or Sean confronting both Black and White himself. It would make sense for the truth to be revealed as in the end of episode 10, White comes in to save Sean, and in the episode 11 preview, Sean appears to not be hot-headed based on his facial expression.
PERHAPS Sean did his own detective work, as again, we are given hints here and there in previous episodes of Sean piecing together what Black's been hiding the whole time. PERHAPS as White is about to tell the truth, Todd contacts them to lure them into his little cat and mouse game with Black being held captive, so then it would be revealed in the episode after.
That preview is certainly doing a good job at making heads spin, haha!