I agree about the diary. It's great theater, but would be tough in court, I think.
I'll certainly defer to your knowledge of procedure. I'm convinced, though, that there are additional evidence reports out there.
I may be having a senior moment here, so be patient with me, but I think my point remains the same whether the chain of custody report comes from OCSO or the M.E.s office. Something is tracking custody. That tracking would be part of discovery, and whatever is being tracked will be labeled with some sort of designation by the State before it gets one from the FBI.
Did that make sense?