So why do you suppose he was all the way on board, at least through August 2016? There is no evidence I'm aware of that wasn't know yet by the DT, and Diamond had 2 full years to fully familiarize himself with RH's case.
If it's true he will only come on board if he believes the death was accidental, then he believed that at least until August 2016, and seemingly committed to testifying at trial.
I just don't find it plausible that a credible expert witness bailed at the last minute because he got delicate about maintaining his reputation.
Good points. I don't know. Maybe they didn't tell him everything in enough detail. He could've been watching. I mean there was a a lot from the other doctor indicating he didn't know the case as well as we do.