Actually, to add to that, you might expect this MORE from them if they didn’t know yes/or/no whether he was guilty of a crime. Perhaps if they knew he was, they’d be more likely to not protect him and to cooperate on what they knew; but if they don’t know if he is guilty of anything, and have a sense of doubt about the circumstances or hope that he is innocent, they don’t want to do anything to drive the story one way or the other. Just a thought from your last paragraph. I still hold out that thus far, the sketchiest thing from them is getting the date he “went missing” wrong. That would be very memorable IMO. That makes me question them more than anything else.