I wish someone would explain to me what these "bizarre" behaviors are.
There's so much to consider in these cases, that is going on behind the scenes, that how much of anything could be considered "bizarre" if we have no clue what that is.
I think the Proudfoots understand that the more they talk, the less LE will talk to them. I think that's exactly why LE has iced out SR (according to him). He can't keep his mouth shut about highly sensitive personal things about his own kid, amongst other things, and what he does tell, he twists and spins, (IMO, but also in his he admitted as such.)
So they definitely won't tell him much sensitive info.