Does notes such as personal diary can be use as evidence to a case? Since everything that listed in there is just a personal opinion the owner(Caroline) which makes it a hearsay imho since that is not SBF actual hand writing or anything that will prove that SBF really did it unless there's a picture and proper documentation to support what it's stating.
Doesn't matter if it's personal, it's evidence of things that have happened and if they can link the discussion presented there to actual events and actions FTX or Alameda took it it will prove they were aware of things and they can't claim they did stuff by mistake. If SBF only defense against those accusations will be that the transcripts are fake, that is revenge etc , etc he will simply be asked what happened in reality, at which point, he knows he is screwed.
I'm pretty sure Caroline thought of this thing when she realized things were becoming dangerous or from the start she wanted to have some dirt on the others, but that doesn't change the content.
I would wait for information about which prison the SBF will be in. If he stays in a federal facility in Brooklyn, it will be bad for him. If he was transferred to another, more comfortable prison with Internet in Putnam County, it would be a completely different matter.
You're speaking from personal experience?
SBF is in a detention center, if ever convicted he will be moved to an FCI, there are virtually zero chances for him to be sentenced for time there.