I believe the prosecution’s concern was for the things that MB wasn’t aware of. Anything he was aware of was can be considered relevant to state of mind.
State prosecutors don’t usually have the support staff that a private firm has, but often have a higher case load. He’s going to have to go through all of that himself.
My take was that there was a list of specific texts between the victim and a 3rd party that the prosecution does not want mentioned on cross. They submitted a motion for those specific texts to be excluded before the trial to avoid them even being mentioned. The defense will respond to the motion and the Judge will decide.
I think Bilinkas will have to choose a workable number of texts/posts from among the “thousands and thousands” of pages and present them to the judge for possible inclusion prior to the trial. That’s what these per trial hearings are about.
This is why you want to do it before a jury is empaneled, because first, you don’t want the jury to have to ignore something they heard of saw. Juries will try to do that, but it’s a big ask and best to avoid it. Second, and this is just my opinion, it can really interrupt the flow and the story you’re trying to tell if you have to argue about every little thing. That can also piss off a jury, and if they don’t like you, they might not drink from your bucket of conclusions. To torture a metaphor.
I would guess that most murder or attempted murder cases don’t involve thousands and thousands of pages of completely crazy text messages and social media posts, an unknown number of which could be presented to the jury during the trial?