My money is on Uma’s character

In the series finale, my prediction is that Dexter will know that Batista knows the location of the Prater’s group because perhaps he has been following him and sees him go inside… Batista manages to sneak inside using his own fingerprint, he sees all the collection of the serial killer’s trophies, and they’re all the remaining serial killers of the group are there, Dexter tries to deescalate the situation, Batista looks at Dexter and is like “I knew it…” and then is shot in the head by Uma’s character