User blog comment:ConspiracyKiller825/The 1st Danganronpa Games/@comment-31779172-20150416211654

I think I have a theory behind the B. But before that, let's get to if it actually is a B.

This would mean that the murderer is either Brett, Aemilia or Octavia. With all of them, at least one of their names begins with B.

However, what if the B was actually a poorly written 13*? That way, the D13 tributes would be the main suspects, But Estella was aiming to kill Marlon, so Astus would be the culprit.

As for the team Fire murderer, I think I already know who the murderer is. *Coughcough*Stitch girl *coughcough*

.* I got it from a Professer Layton puzzle. :P (It's likely incorrect, but whatever)