"Damn, I feel stupid now, but something was happening, and one of them said that something was made out of A text. So they had some evidence, right?"
Wasn't that Ian's confession?
Seriously, this entire episode bugged. No one backed up a single "A" text or email? Fine. But I watch a ton of true crime and these computer gurus can recover almost anything these days. And even without that, there have been numerous notes, tooth necklaces, a note IN Hanna's tooth, and so on that there ought to be quite a lot of proof.
The girls gave blood, which is of course how Hanna's blood wound up on Mona's clothing. The blood drive never reported it missing?? Vials with Spencer's, Aria's, and Hanna's blood all go missing from a blood drive and no one cross-checks the donor list with the actual vials of blood and notices that several donations have disappeared? Come on.
I love the show, but I think it's more for Hanna and Caleb than anything else. They're so pretty together I'd watch them eat soup and be satisfied. But the twisty, makes no sense plot lines are killing this show.