I hope to hell they have the right guy. If not, this case is shot to hell regardless of who is arrested or what is learned in the future.
I wonder (and I know nothing about law) if he is being brought back as a material witness? (Not even sure if that is the right term).
Maybe the guy has AIDS and wants to come back here to get free treatment in prison.
Yesterday we heard that this man knew things about the case that only the murderer could know. If that is true, then either he is the one, OR he must know, or has corresponded with, the real murderer, OR he somehow found out what was in the investigation files. I can't think of another reason he'd know things he shouldn't have known.