Granted he is not a good guy and reality is he is a bit off between his ears by all accounts I have seen.
He does bare resemblance. But they will know. Or they should anyway.
My point is his resemblance is based on TWO layers of suspect sources... a sketch based on vague video evidence. That REALLY makes this a stretch. Now if we had relatively objective high res CCTV pictures to compare him against, I'd put more stock in this.
But for the sake of family closure, I hope this is the right direction. (but I wont hold my breath)