And it's also possible that Karen's note is a fake, although what would be the point then... Just to confuse the town?
Overall, I would vote to execute Hosa; I doubt he's Patrick. He could very well be a doctor-killer. By the way, there's no second Night Doctor from the doctors today (the first was probably an insulin coma), and it's strange that no one was tied to the stake for the second day in a row. Using electroshock or a random Night Doctor from the surgeon today would be illogical, I think.
Here's a question: if a blocker ends up in a role with immunity to blocking, is that indicated in any way?
Added 7 minutes later
Damn, Hosa can't be the doctor-killer; they're all stable...
To sell my soul