In a normal case (no idea about this one) typically, the victim(s) don’t have access to what either the prosecution or defense has. Typically, what would happen is, devices are seized. Forensics are done, audio files extracted, photos, texts, the whole nine yards. The prosecution is going to question their witnesses (the victims) about what they specifically want to use or think the defense might use, in trial, which is going to be a percentage of what they have.
But all that gets disclosed to the defense. All of it.
Now, here we are months after the criminal trial, and all the parties to the civil trial are getting those audios. For the record, the 19,000 SM posts were exchanged in the civil trial a long time ago.
So, it’s hypothetically possible that LK, et Al, are just now finding out what all MB has been sitting on this whole time.