I don't think the state would be that irresponsible to bring in a psychiatrist/psychologist that hasn't actually studied ICA. I'm a bit surprised that the DT wants to do something along those lines. JA or LDB will depose of that nonsense very quickly.
I think the issue with the DT witness will be (if I understand the boundaries given by HHJP) JB will not be able to give the appropriate hypothetical to the witness and the witness cannot testify to the 'general' reactions to death or generally about the grieving process as the jurors are aware of it already themselves- HHJP cited some case - so I think either the state will object or HHJP will call a sidebar
MOO