I'm not THAT suspicious about what the regime claims is in the texts, but there's a part that's really convenient
If you've read what the conspiracy mongers on the Right have fixated on the past few days, a great deal of it has been focused on the weapon. How he got it off the roof, why it looks like he wasn't carrying it when he dropped off the roof in a certain video, and if he did, why did he take it off the roof just to leave it behind to be found.
And then these alleged texts come along and LO AND BEHOLD ... there's an EXACT, detailed explanation for that phenomena!
Perhaps the conspiracy mongers were tipped off about this being part of the evidence, so they rolled with their usual attention-grabbing CT's, knowing what they were seemingly questioning was soon going to be TOTALLY explained?
Another possibility is the authorities involved already know there's not going to BE any trial (due to a number of possibilities), so they can say whatever they want. Which means they could answer the questions that the rightist conspiracy theorists were questioning, absolutely thoroughly.
Or maybe the plan is that by the time any trial happens, he'll have been declared an Enemy Combatant from the known, notorious terrorist group "The Socialist Gay/Trans Antifa Liberation Army", and the trial will be a military tribunal held at Gitmo.
Again, I know this sounds paranoid, and I'm NOT saying the texts aren't legit. But I think pondering the possibility they may not be, and why, is just due diligence